Camera3: fix ZSL processor3 issues

- Return input buffer in capture result. Per hal3.2 spec, we should return the
input buffer in process capture result rather than immediately after process
capture request.
- Make the depths of mZslQueue and mFrameList the same. It doesn't make sense
mFrameList depth is larger than mZslQueue depth.
- Set the depths of mZslQueue and mFrameList based on pipelineMaxDepth.
- Clear result queue while clearing zsl buffer queue.
- Hook up camera3 buffer listener with ZslProcessor3, make sure that adding the
same listener multiple times has no effect.
- Remove flush call in pushToReprocess, it is a guaranteed deadlock once
camera3 buffer listener is hooked up.

Change-Id: I285155ab4241e827145855d628f8e98b881c01d5
diff --git a/services/camera/libcameraservice/device3/Camera3Stream.h b/services/camera/libcameraservice/device3/Camera3Stream.h
index 14f5387..a77f27c 100644
--- a/services/camera/libcameraservice/device3/Camera3Stream.h
+++ b/services/camera/libcameraservice/device3/Camera3Stream.h
@@ -226,8 +226,17 @@
      */
     virtual void     dump(int fd, const Vector<String16> &args) const = 0;
 
+    /**
+     * Add a camera3 buffer listener. Adding the same listener twice has
+     * no effect.
+     */
     void             addBufferListener(
             wp<Camera3StreamBufferListener> listener);
+
+    /**
+     * Remove a camera3 buffer listener. Removing the same listener twice
+     * or the listener that was never added has no effect.
+     */
     void             removeBufferListener(
             const sp<Camera3StreamBufferListener>& listener);