am ac4bacd9: am 16a9d9a7: Fix 2209086: Fix missing callback that was preventing tab bar text from updating.

Merge commit 'ac4bacd9777c12e4cd6ddc335518a61a3f18f47f' into eclair-mr2-plus-aosp

* commit 'ac4bacd9777c12e4cd6ddc335518a61a3f18f47f':