Let getEnabledInputMethodSubtypeList() take userId

This CL lets

  IInputMethodManager#getEnabledInputMethodSubtypeList()

take the useId as an input parameter for consistency with other query
methods.

There should be no developer observable behavior change because now

  InputMethodManager#getEnabledInputMethodSubtypeList()

specifies its own user ID.

Bug: 34886274
Test: make -j CtsInputMethod1  \
                CtsInputMethod2  \
                CtsInputMethodServiceDeviceTests  \
                CtsInputMethodServiceEventProvider  \
                CtsInputMethodServiceHostTestCases  \
                EditTextApp  &&
        atest CtsInputMethodServiceHostTestCases
Change-Id: Ie213ef7e04d6337e303ea331d0a00c7d7f9a6d1a