Camera2: Basic ZSL and precapture trigger support.

- Add capture sequencer to control still image capture process
- Use precapture trigger for standard capture in sequencer
- Add infrastructure for reprocessing streams
- Add ZSL processor to maintain ZSL queue
- Add ZSL capture sequence to sequencer

This patch sets up ZSL mode and precapture triggers.

For now, to enable zsl mode, set the system property camera.zsl_mode
to 1.

Bug: 6243944

Change-Id: Icf8cb1a83a7c11a152a11007c8f3c54f8ea1c70c
diff --git a/services/camera/libcameraservice/Android.mk b/services/camera/libcameraservice/Android.mk
index 1370c62..e27a065 100644
--- a/services/camera/libcameraservice/Android.mk
+++ b/services/camera/libcameraservice/Android.mk
@@ -14,8 +14,10 @@
     camera2/CameraMetadata.cpp \
     camera2/Parameters.cpp \
     camera2/FrameProcessor.cpp \
-    camera2/CaptureProcessor.cpp \
-    camera2/CallbackProcessor.cpp
+    camera2/JpegProcessor.cpp \
+    camera2/CallbackProcessor.cpp \
+    camera2/ZslProcessor.cpp \
+    camera2/CaptureSequencer.cpp \
 
 LOCAL_SHARED_LIBRARIES:= \
     libui \