Instead of renaming the old Matrix class into _Original_Matrix
and have layoutlib provide a full new implementation of Matrix,
we keep the old one by only modifying it to implement the native
methods which calls out to a new Matrix_Delegate class.
The goal is to not have to maintain the java portion in
sync between the framework and the layoutlib version.
Change-Id: I3e1aefffbae45e91b75331c0c6ff2260323deacd
4f291d33e1