Merge "sdk.atree += libbinder_ndk C++ helpers" am: e67994f74f am: b91f558c94 am: 5198cfcd3c

Original change: https://android-review.googlesource.com/c/platform/development/+/1514875

Change-Id: I70208e54dc74fe3ed5fa886e47cedd7025ec3bce