msm8953-common: Build clearkey HIDL service.

Convert clearkey plugin to HIDL to support drm HAL v1.1.
Add SELinux policy for android.hardware.drm@1.1-service.clearkey.

Test: CTS test
  ANDROID_BUILD_TOP= ./android-ccts-tradefed run cts-dev
  --module CtsMediaTestCases
  -t android.media.cts.ClearKeySystemTest#testClearKeyPlaybackCenc

Merged-In: I61e9c272c2a2788fd07d5c12921d28c785661b77

bug: 69635855
Change-Id: I2b6dad3cbefa210400c0169b497ed58d355b85ab