Sync disabled tip

The original design called for displaying different messages for when
global auto-sync is off and airplane mode, but we're considering scratching
those so I didn't cover them here.

To do still are subsequent toasts.

Bug 9825835

Change-Id: I1916e2d95896c2079fa6eeb9fe806fd4d181a27a
diff --git a/proguard.flags b/proguard.flags
index cb8d15f..e0b2c23 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -67,10 +67,6 @@
   *** doNothingClickHandler(...);
 }
 
--keepclasseswithmembers class com.android.mail.ui.ConversationPhotoTeaserView {
-  *** setAnimatedHeight(...);
-}
-
--keepclasseswithmembers class com.android.mail.ui.ConversationLongPressTipView {
+-keepclasseswithmembers class * extends com.android.mail.ui.ConversationSpecialItemView {
   *** setAnimatedHeight(...);
 }