Removed references to HLSPlayerSDK and castCompanionLibraryandroid from README.md.
Removed references to HLSPlayerSDK and castCompanionLibraryandroid from README.md.

objectiveCarlo/player-sdk-native-android,kaltura/player-sdk-native-android,objectiveCarlo/player-sdk-native-android,kaltura/player-sdk-native-android