Merge "Add ".webp" to default compress extensions" am: bf6a120aaa am: f700df50c6 am: d97e7b04a2 am: 6db4bc3852

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1430089

Change-Id: I526e7c236a988d1dd398237e83b5c06f0ed956af