Use generic native routing event handler in MediaRecorder.

We already make a generic native routing event handler. There is no need
to keep the handler class in MediaRecorder.

Bug: 64038649
Test: runtest --path cts/tests/tests/media/src/android/media/cts/RoutingTest.java
Change-Id: I2d54977a6f990fb549d27aabf52f040bd9da58fa
1 file changed