Call enforceCallingPermission instead of annotation EnforcePermission

These test cases failed after this change (ag/19194476).
It uses @android.annotation.EnforcePermission instead
of calling enforceCallingPermission.

When using @android.annotation.EnforcePermission, it
will trigger noteOP, so we can’t use the noteOp
mechanism to fix this bug.

After reverting back to use enforceCallingPermission,
the test cases will pass.

Bug: 242103120
Test: atest HotwordDetectionServiceBasicTest
Change-Id: I5cb6a2a33a3fadd2bcbfc6edece80da743684398