Merge "cameraserver: clear all requests and signal mRequestSignal from...

Merge "cameraserver: clear all requests and signal mRequestSignal from RequestThread during disconnect()." am: e70521b7 am: 40b25026 am: b433c072

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2280835



Change-Id: I792e798352aeb09d76633337e1e836308f116e4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>