Merge "libstagefright: initializes member variables in constructor" am: f25dd316

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2560793



Change-Id: Ie8158c3a8510b4c09c094cfc5546c6ab7529a3e0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>