[ItsService] add callback for onImageAvailable

Details: CameraExtensionSession was closed before onImageAvailable() is
called. Changed behavior to wait for callback from onImageAvailable() in
addition to onCaptureResultAvailable().

Bug: 293297668
Test: tested locally on offending device.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:58a1a69b0a7a418da3163ce3bc33bf362110b7f5)
Merged-In: I22f68b3f4fa3daa875f643a6eca755971e6f96d8
Change-Id: I22f68b3f4fa3daa875f643a6eca755971e6f96d8