Add contentDescription to QCActionItem / QCItem am: b04a6e0072 am: 829ee323b4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Car/systemlibs/+/22746901

Change-Id: Ia2c88882422c94b6c6266dc85296f73e67f9ce20
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>