Merge "libbinder_ndk: document #apex service caveats" am: 02491a7d am:...

Merge "libbinder_ndk: document #apex service caveats" am: 02491a7d am: d80ee01b am: ca605a15 am: 17435d20

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1653857

Change-Id: I2d900898352f8c676045dd0c647185e8682a1200