Dispatch accessibility gesture if device supports touch

This change fixes the issue where AccessibilityService was not able to
dispatch a gesture if a device doesn't have a touchscreen hardware
feature, resulting the behavior gap between CTS and framework.

With this CL, AccessibilityService can dispatch a gesture if the device
declares touchscreen or faketouch hardware features.

Bug: 177021722
Test: AccessibilityManagerServiceTest AccessibilityServiceConnectionTest
Test: CtsAccessibilityServiceTestCases on crosshatch and kindred
Change-Id: I8a1e4884d1283705d409ed38e35047ec2dcd89f0