Merge "Document functions that may panic." am: 05933f7925 am: 3c064e40ac am: 23625f3bf2 am: 9f3a897e5e am: 67083e5e38

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1834433

Change-Id: Ie025e9d3a5e708d876b8b4b3f8fe6503b5e2f63a