Revert "Revert "Avoid jumps to faulty position after seeks""

This reverts commit 9373ddf03ec4b5be95f602c401646c60f8fdb26c.
CameraSource: restore duplicate ExtendedUtils.h inclusion

from an inclusion+definition order standpoint, it's conceivable that including this file a second time could have different effects. If it ain't broke, stop being anal retentive.

Change-Id: Idbb7d6615ac1cc332b8b25f81e162de171e5a33d
miracast: guess I'm the cabrón on this one

dropped entirely upstream of the original miracast commit

Change-Id: I333d8d0497fa81824c685c144bfa11f8ec39d697