Dumpsys for FrameTimeline

Create a dumpsys interface for dumping the Display Frames and
SurfaceFrames stored within FrameTimeline. This change also adds
jankType and jankMetadata fields to SurfaceFrames and DisplayFrames to
classify the jank.

Bug: 162889501
Test: adb shell dumpsys SurfaceFlinger --frametimeline [-jank|-all]
Change-Id: Iac8c8377cf2039e982f59e6d45f7e88a42613154