Merge tag 'android-7.1.0_r4' of https://android.googlesource.com/platform/hardware/ril into 71

Android 7.1.0 release 4
tree: d23bc12af98c9a8c9580d920f91133999a2d608a
  1. include/
  2. libril/
  3. librilutils/
  4. reference-ril/
  5. rild/
  6. Android.mk
  7. CleanSpec.mk