Default accessibility hint is read for buttons

Summary: [Android] [Fixed] - Make sure the default accessibility hint is read for buttons on Android.

Reviewed By: PeteTheHeat

Differential Revision: D16974987

fbshipit-source-id: e7b932041f82d41271d9393e651967789c05f38a

Author: Anda Bereczky

ReactAndroid/src/main/java/com/facebook/react/uimanager/ReactAccessibilityDelegate.java

@@ -290,6 +290,9 @@ public static void setRole(
     } else if (role.equals(AccessibilityRole.IMAGEBUTTON)) {
       nodeInfo.setRoleDescription(context.getString(R.string.imagebutton_description));
       nodeInfo.setClickable(true);
+    } else if (role.equals(AccessibilityRole.BUTTON)) {
+      nodeInfo.setRoleDescription(context.getString(R.string.button_description));
+      nodeInfo.setClickable(true);
     } else if (role.equals(AccessibilityRole.SUMMARY)) {
       nodeInfo.setRoleDescription(context.getString(R.string.summary_description));
     } else if (role.equals(AccessibilityRole.HEADER)) {

ReactAndroid/src/main/res/views/uimanager/values/strings_unlocalized.xml

@@ -12,6 +12,10 @@
     name="image_description"
     translatable="false"
     >Image</string>
+  <string
+    name="button_description"
+    translatable="false"
+    >Button</string>
   <string
     name="imagebutton_description"
     translatable="false"