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Change-Id: I91b2d1d838a6b9c58906799c86acdc6387f3e58c
enable support for Android SEEK and remove local ril.h

Change-Id: I9981a12a80f9c0a123c237656df3f5bb96d80677
overlay: Advertise camera button presence for qwerty devices

- xt897 is the only moto_msm8960 family member with physical
  camera button while it's also the only qwerty device, so let's
  indicate the camera button presence based on the qwerty
  availability
- while this is not always correct in the case of an external
  keyboard connected to a non-qwerty moto-msm8960 device,
  it covers the majority of use cases quite well anyway

Change-Id: I7e1a8ac6a7bc00736ff838e39f08d30a40d6392e