Merge "Migrate from android::String isEmpty to empty" into aosp-main-future am: dcf8afe1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/24605487



Change-Id: I9ff8e7e005c2a557d6fd74eccbb3e1a9aecf6b35
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>