Add RootTargetPreparer to CtsOnGsiTrebleFrameworkVintfTest

CtsOnGsiTrebleFrameworkVintfTest requires root privilege, but
android.os.cts.OsHostTests#testNonExportedActivities fails if adb runs
as root.

This patch adds RootTargetPreparer which restores root state after the
module is executed.

Bug: 111575895
Test: vts-tradefed run cts-on-gsi --include-filter CtsOnGsiTrebleFrameworkVintfTest --include-filter CtsOsHostTestCases
Change-Id: I892afcd01cacede37807e2bb0cd5c56e8a2fb429
1 file changed