Merge cherrypicks of [18563202, 19970324, 15982545, 20120242, 20208339, 20211078, 20291140, 20251345, 20223219, 20122955, 20234866, 20219552, 20426455] into security-aosp-qt-release.

Change-Id: Ifcd157219e4cecce5376bae406c5d57ffd96716e