Fix OHM H/W key shortcut dosn't work appropriately

When one-handed mode disabled
1. Turn on the shortcut of the OHM with hold volume keys
2. Hold the volume keys
Should trigger one-anded mode

Due to S/W & H/W shortcut keys are mapping to different settings
S/W : ACCESSIBILITY_BUTTON_TARGETS
H/W : ACCESSIBILITY_SHORTCUT_TARGET_SERVICE
We should check both status of the them.

Bug: 193411296
Test: atest WMShellUnitTests
Change-Id: I3994ab89fd6163c283969cc3175877e29b44c67a