Merge "Migrate from android::String isEmpty to empty" into main am: 18560efc30 am: 0bb51f7606 am: 60397afb11 am: ba8441f90e am: 2c4802eb15

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

Change-Id: Id6223d951a4756c0b97c1b248d0279c85867c6b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>