Merge "libbinder_ndk: separate libbinder plat headers" am: b40b64d0f8 am: 6a3034c383 am: d309d9a13c

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1490135

Change-Id: Idc3d8038a786318fa7fa0d3df2a6d8f8e0b7abe5