Fix all apps auto scroll issue on talkback mode

b/30769215

Change-Id: Idd0bbe1ac15c02d42eb28731955b80bab61ba6cc

proguard.flags

@@ -82,3 +82,11 @@
   *;
 }
 
+# Proguard will strip methods required for talkback to properly scroll to
+# next row when focus is on the last item of last row when using a RecyclerView
+# Keep optimized and shrunk proguard to prevent issues like this when using
+# support jar.
+-keep allowoptimization,allowshrinking class android.support.** {
+  *;
+}
+