don't assert on debug builds either

I'm seeing several IllegalStateException crashes due to e.g. having an
alert posted when app's in the background. Need to fix them, but the
debug build crashing isn't helpful. Log.e() instead.

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

@@ -132,7 +132,8 @@ public class DBAlert extends XWDialogFragment {
                                 Log.d( TAG, "null activity..." );
                             }
                         } catch ( IllegalStateException ex ) {
-                            Assert.assertFalse( BuildConfig.DEBUG );
+                            // Assert.assertFalse( BuildConfig.DEBUG );
+                            Log.e( TAG, "got ISE; dropping alert" );
                         }
                     }
                 } );