MediaBrowser2: Fix naming inconsistencies
This CL modifies following APIs:
1. getLibraryRoot() related
- onGetRoot => onGetLibraryRoot
- onGetRootResult => onGetLibraryRootDone
2. getItem() related
- onLoadItem => onGetItem
- Also renamed argument: itemId => mediaId
- onItemLoaded => onGetItemDone
3. getChildren() related
- notifyChildrenChanged/onChildrenChanged
- Renamed argument: childCount => itemCount
- onLoadChildren => onGetChildren
- onChildrenLoaded => onGetChildrenDone
4. getSearchResult() related
- onLoadSearchResult => onGetSearchResult
- onSearchResultLoaded => onGetSearchResultDone
Bug:
73711101
Test: Passed MediaBrowser2Test
Change-Id: Ic8d6530d3913d9becdaada32283e9fe1f7e534a9