camera2: Fix native binder interface and add tests.

- Add CameraBinderTests for limited coverage of native
  camera2 binder interfaces for the camera service.
- Fix several bugs in the native binder interfaces.

Bug: 18468810
Change-Id: Iab2d81a5cacd20daf7454aeeed033cc13d88452c
diff --git a/camera/tests/Android.mk b/camera/tests/Android.mk
index 5d37f9e..3777d94 100644
--- a/camera/tests/Android.mk
+++ b/camera/tests/Android.mk
@@ -17,7 +17,8 @@
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 
 LOCAL_SRC_FILES:= \
-	VendorTagDescriptorTests.cpp
+	VendorTagDescriptorTests.cpp \
+	CameraBinderTests.cpp
 
 LOCAL_SHARED_LIBRARIES := \
 	libutils \