Respect shouldShowInInputMethodPicker again

This is a follow up CL to my previous CL [1], which inlined

  InputMethodSubtypeSwitchingController
      #getSortedInputMethodAndSubtypeListForImeMenuLocked

for simplicity with accidentally flipping "forImeMenu" parameter [2]
from true to false.

With this CL, "forImeMenu" becomes true again as it used to be.

 [1]: Ibcc03107665975f237f6d7e0ee098d82e49d54ba
      46e75da5
 [2]: I18dda0525168f9195606840239507b9daba65be7
      43dbb549

Bug: 309868254
Bug: 309837937
Test: presubmit
Change-Id: I3ca6f1abfb46048772c63a984859fc61554a5b35