Append path strings to the first argument if it's an rvalue
Bug: 183435580
Test: atest libincfs-test service.incremental_test
Change-Id: I52c4a1f0e4ad3547aeccac96a3393323e3be9adb
The implementation of IIncrementalManager.aidl. TODO to refactor this.
Test: atest service.incremental_test
Change-Id: Ib8c8a9c0e7f0289b4bcd8961fa39746ed12b4310