Added SPDX-license-identifier-BSD to:
  accel/Android.bp
  common/Android.bp
  components/Android.bp
  plugin_store/Android.bp
  service/Android.bp
  store/Android.bp
  tests/c2_comp_intf/Android.bp

Added SPDX-license-identifier-BSD legacy_unencumbered to:
  Android.bp
  tests/c2_e2e_test/jni/Android.mk

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I4ef032a3849d650e13761a868b45309275d408a2