Remove no longer needed import of RequiredPermission annotation module

This module were required when functions were wrapped with e.g.
@RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT).
Now they are not wrapped and import remains.

Tag: #feature
Bug: 261362580
Test: atest GoogleBluetoothInstrumentationTests
Change-Id: I703b5e1ebffc11b96f47d8f0f3ed55b21f8e96c5