Merge "Migrate from android::String isEmpty to empty [process]" into main am: 846d6a30bc am: 4abf02bc37 am: c6a4960b26 am: 63979ebbb2 am: d6a3e9aaa2

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2707679

Change-Id: I5c37f78fea6b3e504109eafa01fca2f0cfc021ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>