Cleanup Frontend Status

 * Rename FrontendStatus.Atsc3PlpInfo to Atsc3PlpTuningInfo
 * FrontendStatus.Atsc3PlpInfo#isLock renamed to isLocked
 * FrontendStatus#isRfLock renamed to isRfLocked

Bug: 150725571
Test: mmm
Change-Id: I93c61b15273882c6e1de7cf2b39e6f2e7103f146
2 files changed