Use DeviceFeatureModuleController to require FEATURE_INPUT_METHODS

This is a preparation before adding a ForceStopTest into
CtsInputMethodInstallTestCases.

Instead of having

  @RequireFeature(CommonPackages.FEATURE_INPUT_METHODS)

in every file, this CL uses

  DeviceFeatureModuleController

in AndroidTest.xml in favor of simplicity.

There must be no observable behavior change.

Bug: 333591545
Test: atest CtsInputMethodInstallTestCases
Change-Id: I359b027c3fc6afc7e93ccdbb996fe0f2fcfea82f