Use configurable default Double Tap Power Gesture action

Read configuration value for default selected target action for multi
target double tap power button gesture.

Test: atest GestureLauncherServiceTest
Flag: android.service.quickaccesswallet.launch_wallet_option_on_power_double_tap
Bug: 385201633
Change-Id: Icc9ed395d63e6bb60b0909478e742c62feea088c