Associate WebP Mime-Type with FILE_TYPE_WEBP.
Associate WebP Mime-Type with FILE_TYPE_WEBP.

The last change for adding WEBP Mime-Type
(https://android-git.corp.google.com/g/#change,112919) had this bug.
Fixing the bug in this change.

Change-Id: I084b66de4aabb3892fb0e6fa36062a52d4dcc224

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base