Don't look through the buffer cache in protected contexts am: a0c7cca5 am:...

Don't look through the buffer cache in protected contexts am: a0c7cca5 am: 6fd105f0 am: e8799f6b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/24666066



Change-Id: Icce494adb6428025769c8ffd16b74e08a1e144a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>