Add IptvFrontendCapabilities API, fix JNI typo

Test: atest TunerTest.java#testFrontendStatus,
testFrontendStatusReadiness,testRequestFrontendThenTune,
testMultiTuning
Bug: 266967059

Change-Id: I275238f9235b4ae2f2c114b1d52b954ea2f3846f
4 files changed