Do not check AppOp if not required

Only check the AppOp if a sensor explicitly requires an AppOp.
Otherwise, only check if the client has permission to access the
sensor.

Bug: 131910349
Test: Verified a_sns_test can access sensors.
Test: Verified app targeting Q must have AR permission to access Step
      Detector and Step Counter.
Test: Verified app targeting P with AR permission defined in manifest
      cannot receive Step Counter or Step Detector events if user
      revokes AR permission.
Test: Verified app targeting P without any permissions defined in the
      manifest can access Step Counter and Step Detector.
Test: Verified app targeting J cannot receive Step Counter or Step
      Detector events if user revokes AR permission.
Change-Id: I3c2dd20889b99bce047025607cc6e921330de52e