Fix Magnification Settings didn't restore via D2D transfer

ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED is replaced
with ButtonTargets setting value. We address it in data migration but
not in D2D

Consider D2D, we restore it to ButtonTargets value when the restored
sdk version of the received intent is below R.

Bug: 155943759
Test: manual test
     1. prepare an Android Q device and an Android R device
     2. backup settings value of Android Q device by the google account.
     3. Launch setupwizard to restore it by the google account.
Change-Id: I5df070dd1ef880ac1ee5c0867b42e88782348a1b