Fix a few cases of fields sharing method names
Fix a few cases of fields sharing method names

Refs https://pmd.github.io/pmd-6.8.0/pmd_rules_java_errorprone.html#avoidfieldnamematchingmethodname

whymarrh/RxBroadcast,whymarrh/RxBroadcast,RxBroadcast/RxBroadcast,RxBroadcast/RxBroadcast,RxBroadcast/RxBroadcast,RxBroadcast/RxBroadcast