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

Merge "libstagefright: initializes member variables in constructor" am: f25dd316 am: 04eb4c7b am: 1ee220c0 am: b020be2b

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



Change-Id: Ia299b5eb78992bb0b368b221135237ea9a0e538a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>