RESTRICT AUTOMERGE [ExternalStorageProvider] Revoke URI permissions by path

Add support for revoking URI permissions associated with a specific file path. This is handled via a new revoke_uri_permission call that resolves the path to a document URI and revokes all its permissions.

Bug: 463362836
Test: manual
Flag: EXEMPT BUGFIX
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:5c1429406e2c9caef83f085b0d3a63f6f5e25ca9
Merged-In: I8044d75b7e58555e4e11546b30304a0bfbbda95e
Change-Id: I8044d75b7e58555e4e11546b30304a0bfbbda95e