InputManager: Support amplitude control for InputDeviceVibrator

Add support for sending vibration amplitude(s) from OneShot and
Waveform VibrationEffects to the native layer to support variable
amplitude vibration motors in input devices such as gamepads.

Fix bug with vibration API. In N, the VibrationEffect method which
takes both timings and amplitudes states that each timing/amplitude
pair makes the vibration last for the specified duration with the
specified amplitude, 0 meaning the motor is off. If this method
is used with an input device vibrator, it turns off for every even
numbered element, regardless of the amplitude value. The method
which takes only timing values works as expected.

Test: Connect a gamepad whose driver supports FF_RUMBLE, find it
      with the android input framework, and do something like this:

      // waveform where rumble magnitude doubles every 2 seconds
      VibrationEffect effect = VibrationEffect.createWaveform(
              new long[] { 2000L, 2000L, 2000L, 2000L, 2000L },
              new int[] { 16, 32, 64, 128, 255 },
              -1);
      inputDevice.getVibrator().vibrate(effect);

Bug: 136215622
Bug: 38511270
Change-Id: I06afd374e30d63b49aa79fa2b68e2a236b5347b2