Camera: ProCamera - add createStreamCpu and unit test

Change-Id: I468172dbfdd78510b273bf9d119c950cbeda7ea3
diff --git a/services/camera/libcameraservice/ProCamera2Client.cpp b/services/camera/libcameraservice/ProCamera2Client.cpp
index aa02f10..f850034 100644
--- a/services/camera/libcameraservice/ProCamera2Client.cpp
+++ b/services/camera/libcameraservice/ProCamera2Client.cpp
@@ -234,6 +234,13 @@
 
     Mutex::Autolock icl(mIProCameraUserLock);
 
+    mDevice->clearStreamingRequest();
+
+    status_t code;
+    if ((code = mDevice->waitUntilDrained()) != OK) {
+        ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__, code);
+    }
+
     return mDevice->deleteStream(streamId);
 }