Update Keystore Migration flag in the CTS test.

Bug: 353597412
Bug: 352733140
Flag: android.net.wifi.flags.legacy_keystore_to_wifi_blobstore_migration_read_only
Test: atest WifiMigrationTest
Change-Id: I92309dd37c0f0411aff8e44cb5e5acfcb976c983
1 file changed