Add vdc checkpoint supportsBlockCheckpoint

Also add vdc checkpoint supportsFileCheckpoint
This is to allow tests to be specific to supported checkpoint mode.

Test: Built on Taimen and Crosshatch, made sure both new functions work
as expected

Change-Id: I0eab7453b13c0a2e31840ef9ad24a692cec55b00
diff --git a/VoldNativeService.cpp b/VoldNativeService.cpp
index 69f8a8c..6868c83 100644
--- a/VoldNativeService.cpp
+++ b/VoldNativeService.cpp
@@ -879,5 +879,19 @@
     return cp_supportsCheckpoint(*_aidl_return);
 }
 
+binder::Status VoldNativeService::supportsBlockCheckpoint(bool* _aidl_return) {
+    ENFORCE_UID(AID_SYSTEM);
+    ACQUIRE_LOCK;
+
+    return cp_supportsBlockCheckpoint(*_aidl_return);
+}
+
+binder::Status VoldNativeService::supportsFileCheckpoint(bool* _aidl_return) {
+    ENFORCE_UID(AID_SYSTEM);
+    ACQUIRE_LOCK;
+
+    return cp_supportsFileCheckpoint(*_aidl_return);
+}
+
 }  // namespace vold
 }  // namespace android