Support accessibility shortcut secondary action (6/n)

Implements new edit shortcut dialog selection and save what user
prefered key back for color inversion, color correction, magnifiction,
downlaoded service - LEGACY, INVISIBLE, INTUITIVE case.

Bug: 142530063
Bug: 142531156
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityUtilTest
Test: make RunSettingsRoboTests2
Change-Id: I94607db918047ae4082457dd33f17c8675934e2c