[automerger skipped] Merge "free weakref to linearblock when it is destroy" am: a4f4128f am: fe121d44 am: c97bc467 -s ours

am skip reason: Change-Id Iee1b2618bd5c970b728dbc0301b84ff43debde58 with SHA-1 0a94a23c is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1538181

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4aa700356bbdaf33d8c06118ebfc5e27ecec4c5d