docs: Typo fix (android.permissions -> android.permission) am: 449b1fa9

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



Change-Id: Ic92d8d6756c308b7190d35830798d74d7c29ed7c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>