Camera2: Debug and logging fixes.

- Fix LOG_TAGs to work with standard logcat filtering.
- Add ATRACE to Camera2Device
- Shorten thread names to fit in 16 characters
- Remove some ATRACEs to avoid flooding trace unnecessarily

Bug: 7220520
Change-Id: Ief8d677b5c8bb35d94e0f21b11b86505e83169ea
diff --git a/services/camera/libcameraservice/camera2/CameraMetadata.cpp b/services/camera/libcameraservice/camera2/CameraMetadata.cpp
index 8399e20..835587d 100644
--- a/services/camera/libcameraservice/camera2/CameraMetadata.cpp
+++ b/services/camera/libcameraservice/camera2/CameraMetadata.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "CameraMetadata"
+#define LOG_TAG "Camera2-Metadata"
 #include <utils/Log.h>
 #include <utils/Errors.h>