[CS] Remove SystemUIBinder, have modules be directly included.

SystemUIBinder has become a not-helpful indirection now that our dagger
modules are better organized. Remove it and just include the sub-modules
directly in the relevant top-level modules.

Bug: 277764509
Test: SysUI, SysUIGoogle compile
Flag: EXEMPT refactor
Change-Id: I4a9cf0c3c302fc40365f07c90a0ad9466e966426