am b7dc4ff8: am a9a7b44b: am b48361b1: am b86f0769: use PNG as the transport encoding for images

* commit 'b7dc4ff88d74752af5bfe01121f8e0a2a127888e':
diff --git a/src/com/android/launcher3/LauncherBackupHelper.java b/src/com/android/launcher3/LauncherBackupHelper.java
index 9b901ee..e42526d 100644
--- a/src/com/android/launcher3/LauncherBackupHelper.java
+++ b/src/com/android/launcher3/LauncherBackupHelper.java
@@ -188,7 +188,7 @@
             Log.e(TAG, "launcher backup has failed", e);
         }
 
-        out.key = keys.toArray(BackupProtos.Key.EMPTY_ARRAY);
+        out.key = keys.toArray(BackupProtos.Key.emptyArray());
         writeJournal(newState, out);
         Log.v(TAG, "onBackup: wrote " + out.bytes + "b in " + out.rows + " rows.");
     }
@@ -260,7 +260,7 @@
         // will catch any changes the restore process might have made
         Journal out = new Journal();
         out.t = 0;
-        out.key = mKeys.toArray(BackupProtos.Key.EMPTY_ARRAY);
+        out.key = mKeys.toArray(BackupProtos.Key.emptyArray());
         writeJournal(newState, out);
         Log.v(TAG, "onRestore: read " + mKeys.size() + " rows");
         mKeys.clear();