Merge "Migrate from android::String isEmpty to empty [bootanimation]" into...

Merge "Migrate from android::String isEmpty to empty [bootanimation]" into main am: 1de56955 am: 757b0507 am: 94faa189 am: 4d51bc3d am: 34a4089b

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2725975



Change-Id: I4c1ea79beb47456766940332593553e1e012c7b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>