Change to using sysprop for vrflinger_test

The configstore service was deprecated. So change to use sysprop
instead of configstore.

Bug: 124531214
Test: m -j
Change-Id: I5367b5715c797facd37736eee84651addbaa230d
Merged-In: I5367b5715c797facd37736eee84651addbaa230d
(cherry picked from commit 8e852f5231d34b80a19aa5cceb0c8fec06fb3236)
2 files changed