replace .png arrows with .svg

xwords4/android/app/src/main/java/org/eehouse/android/xw4/BoardCanvas.java

@@ -487,12 +487,12 @@ public class BoardCanvas extends Canvas implements DrawCtx {
         Drawable arrow;
         if ( vert ) {
             if ( null == m_downArrow ) {
-                m_downArrow = loadAndRecolor( R.drawable.downarrow, useDark );
+                m_downArrow = loadAndRecolor( R.drawable.ic_downarrow, useDark );
             }
             arrow = m_downArrow;
         } else {
             if ( null == m_rightArrow ) {
-                m_rightArrow = loadAndRecolor( R.drawable.rightarrow, useDark );
+                m_rightArrow = loadAndRecolor( R.drawable.ic_rightarrow, useDark );
             }
             arrow = m_rightArrow;
         }

xwords4/android/app/src/main/res/drawable/ic_downarrow.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="200dp"
+    android:height="200dp"
+    android:viewportWidth="200"
+    android:viewportHeight="200">
+  <path
+      android:pathData="M10.583,141.792L10.583,67.708L100.542,67.708L100.542,14.792L190.5,104.75 100.542,194.708v-52.917z"
+      android:strokeAlpha="1"
+      android:strokeLineJoin="miter"
+      android:strokeWidth="0.26458332"
+      android:fillColor="#000000"
+      android:strokeColor="#000000"
+      android:fillAlpha="1"
+      android:strokeLineCap="butt"/>
+</vector>

xwords4/android/app/src/main/res/drawable/ic_rightarrow.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="200dp"
+    android:height="200dp"
+    android:viewportWidth="200"
+    android:viewportHeight="200">
+  <path
+      android:pathData="m63.5,14.792 l74.083,0L137.583,104.75L190.5,104.75L100.542,194.708 10.583,104.75L63.5,104.75Z"
+      android:strokeAlpha="1"
+      android:strokeLineJoin="miter"
+      android:strokeWidth="0.26458332"
+      android:fillColor="#000000"
+      android:strokeColor="#000000"
+      android:fillAlpha="1"
+      android:strokeLineCap="butt"/>
+</vector>

xwords4/android/img_src/downarrow.svg

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="200mm"
+   height="200mm"
+   viewBox="0 0 200 200"
+   version="1.1"
+   id="svg1593"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   sodipodi:docname="downarrow.svg">
+  <defs
+     id="defs1587" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.7"
+     inkscape:cx="-180"
+     inkscape:cy="560"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid6508" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata1590">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-97)">
+    <path
+       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="M 10.583336,238.79167 V 164.70834 H 100.54167 V 111.79167 L 190.5,201.75 100.54167,291.70833 v -52.91666 z"
+       id="path7105"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cccccccc" />
+  </g>
+</svg>

xwords4/android/img_src/rightarrow.svg

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="200mm"
+   height="200mm"
+   viewBox="0 0 200 200"
+   version="1.1"
+   id="svg1593"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   sodipodi:docname="downarrow.svg">
+  <defs
+     id="defs1587" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.7"
+     inkscape:cx="-180"
+     inkscape:cy="560"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid6508" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata1590">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-97)">
+    <path
+       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 63.5,111.79167 74.08333,0 V 201.75 H 190.5 L 100.54167,291.70833 10.583333,201.75 H 63.5 Z"
+       id="path7105"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cccccccc" />
+  </g>
+</svg>