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

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



Change-Id: I2d91a8c63bb2d55b0eb4990a86b782298d79e659
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>