Camera: Add support for readout timestamp

The readout timestamp is added to CaptureResultExtras used by
onCaptureStarted(). If the HAL supports readoutTimestamp, the
readout timestamp is passed in onCaptureStarted().

Test: atest Experimental2022SystemTest
Bug: 229097448
Bug: 229773853
Change-Id: I1ac822b14a2a4198e7c8ef17a39212f504c2d719
diff --git a/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp b/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp
index ed66df0..f4e3fad 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp
+++ b/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp
@@ -787,10 +787,12 @@
         SessionStatsBuilder& sessionStatsBuilder) {
     bool timestampIncreasing =
             !((request.zslCapture && request.stillCapture) || request.hasInputBuffer);
+    nsecs_t readoutTimestamp = request.resultExtras.hasReadoutTimestamp ?
+            request.resultExtras.readoutTimestamp : 0;
     returnOutputBuffers(useHalBufManager, listener,
             request.pendingOutputBuffers.array(),
             request.pendingOutputBuffers.size(),
-            request.shutterTimestamp, request.shutterReadoutTimestamp,
+            request.shutterTimestamp, readoutTimestamp,
             /*requested*/true, request.requestTimeNs, sessionStatsBuilder, timestampIncreasing,
             request.outputSurfaces, request.resultExtras,
             request.errorBufStrategy, request.transform);
@@ -852,7 +854,10 @@
             }
 
             r.shutterTimestamp = msg.timestamp;
-            r.shutterReadoutTimestamp = msg.readout_timestamp;
+            if (msg.readout_timestamp_valid) {
+                r.resultExtras.hasReadoutTimestamp = true;
+                r.resultExtras.readoutTimestamp = msg.readout_timestamp;
+            }
             if (r.minExpectedDuration != states.minFrameDuration) {
                 for (size_t i = 0; i < states.outputStreams.size(); i++) {
                     auto outputStream = states.outputStreams[i];