[LSC] Add LOCAL_LICENSE_KINDS to hardware/interfaces

Added SPDX-license-identifier-Apache-2.0 to:
  camera/metadata/3.7/Android.bp
  camera/metadata/3.8/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all
Change-Id: I31cece41e97d4b6cc8e425c05ba84d94b6b59065