docs: Typo fix (android.permissions -> android.permission) am: 449b1fa9ec am: 7dfe945428 am: 507ce0c261

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

Change-Id: If45b913ab109860633184efe4a39a5a64b6d59c8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>