Merge "libamrextractor: Add host support" am: bcfc35b0e3 am: beafa62826 am: e16c698162 am: f02d1c35a3 am: 4b592e6560

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1325719

Change-Id: I7bcfcd78de3842fa2e2d152e5ff0ef492e8296ca