Fix broken MediaSessionManagerHostTest

Skips the test when managed profile is not available on the test device.

Test: cts-tradefed run cts -m CtsMediaHostTestCases (without the patch,
      it fails, with the patch, it passes.)
Test: passed on Sailfish, Fugu, Ryu
Bug: 62909795

Change-Id: Ifacd63503ed95c78b86063d5aab56407171311d8
2 files changed