Make net cts not using isolated storage

Disabling isolated storage so existing tests can still write files to
/sdcard and shell can read it successfully.

Bug: 124651276
Test: atest android.net.cts.NetworkWatchlistTest#testGetWatchlistConfigHash
Change-Id: I6c40d1ae12fc2cff76c976c11650423df5ce044f
1 file changed
tree: 0edc91378bfbdc2449936f1ba4347cd9d94ec5b2
  1. tests/