regex-instance: MatrixInstance: add regex API.

CompatibilityMatrix::forEachInstance() returns this object.
Add regex API to MatrixInstance so that regex pattern matching
can be used.

Bug: 73738616
Test: libvintf_test
Test: vintf_object_test
Test: vts_treble_vintf_test

Change-Id: Id5a3ecdf850309135751891bf010529d9d40d5a0
3 files changed