[automerger skipped] Merge "Emit TRIM_MEMORY_UI_HIDDEN event on switching to...

[automerger skipped] Merge "Emit TRIM_MEMORY_UI_HIDDEN event on switching to background" into sc-v2-dev am: b5d43be7 am: a3837872 -s ours

am skip reason: Merged-In I901d7d32790d6b888f960ca1bdfb160ea1786cde with SHA-1 88dcaf3a is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15884037

Change-Id: Ie39fe9c06c8d3f9964dfe407b6e562b2aa71983c