Fix nested run as shell exception

The ConnectUtil.clearWifiBlocklist calls runAsShell but the
permissions are already adopted by testBlockedStatusCallback.

Adapt the permissions when the needed API is called. Also
add some logs for future debugging.

Test: atest CtsNetTestCasesLatestSdk:android.net.cts.ConnectivityManagerTest#testBlockedStatusCallback
Fix: 266608770
Change-Id: I0b15d4e816f3138a732515c6f11bd0dc723b03fe
1 file changed