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- Add method to query device rumble capabilities in EventDeviceInfo.
- Add methods to support vibration (PlayVibrationEffect, StopVibration,
StoreRumbleEffect, StartOrStopEffect, etc.) in GamepadEventConverterEvdev.
- Route methods to control gamepad vibration through InputController to
GamepadEventConverterEvdev.

BUG=b:158685462
TEST=Add tests to GamepadEventConverterEvdevTest; all tests pass.

Change-Id: Ic1a2d1d1965ddd0a9321a93224a59bc9d1b681fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2294560
Commit-Queue: Merissa Tan <liyingtan@google.com>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Mitsuru Oshima (OOO) <oshima@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Auto-Submit: Merissa Tan <liyingtan@google.com>
Cr-Commit-Position: refs/heads/master@{#797041}