docs: Typo fix (android.permissions -> android.permission) am: 449b1fa9ec am: 2529d51dee

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24811684

Change-Id: I40344169cd1851ee90e3c08b0b95bbc15414f5a8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>