ANDROID: ltp: post_update.sh: Support stable release updates am: f0df2e76fb

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/ltp/+/42644208

Change-Id: I2a551f4b7f99462491cd8ecdc881a965565079c9
Signed-off-by: Automerger Merge Worker <[email protected]>