Merge "Migrate from android::String isEmpty to empty" into main am: 18560efc30 am: 0bb51f7606

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2705823

Change-Id: Idf32d93572278e9381004390e26a30fde8cd4777
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>