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

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

Change-Id: Ifb6f1dc078d8daaa089f033509bebbd9440d4345
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>