Remove all the extra accessor methods added by javac in support-cardview.

Change private methods to be package protected to avoid extra methods
that get added to be able to access them from inner classes.

This CL saves 4 methods in our jar.

Bug: 31075707
Change-Id: I0ce25d52e17c89dbaef5b3e8a88d959eb5e390cb
diff --git a/v7/cardview/src/android/support/v7/widget/CardView.java b/v7/cardview/src/android/support/v7/widget/CardView.java
index 3da3243..3b47a54 100644
--- a/v7/cardview/src/android/support/v7/widget/CardView.java
+++ b/v7/cardview/src/android/support/v7/widget/CardView.java
@@ -100,11 +100,11 @@
      * CardView works around this issue by recording user given parameters and using an internal
      * method to set them.
      */
-    private int mUserSetMinWidth, mUserSetMinHeight;
+    int mUserSetMinWidth, mUserSetMinHeight;
 
-    private final Rect mContentPadding = new Rect();
+    final Rect mContentPadding = new Rect();
 
-    private final Rect mShadowBounds = new Rect();
+    final Rect mShadowBounds = new Rect();
 
     public CardView(Context context) {
         super(context);