Add new permission android.permission.READ_UPDATE_ENGINE_LOGS

This permission is used to gain access to update_engine_log
directory.

This is a subset of android.permission.READ_LOGS and is intended
to limit the log access for components that only want to access
update engine logs.

Flag: com.android.update_engine.minor_changes_2025q4
Bug: 397893018
Test: Flash software, check permissions of directory
    Flash software without this patch. Flash software with this
    CL on top. Confirm permission. Confirm log files included in
    bugreport.
Change-Id: I517c8aab3159cdb970c9499d2aad89cc262b68e2