Unbreak testStartUsingNetworkFeature_enableHipri failure

aosp/1261619 break legacy API that only supported for SDK which is
smaller than android M, caller need to have network stack permission
to request network with legacy type. Fix failure by whitelist permission
check for the caller who built with order SDK(< M).

Bug: 152229492
Test: atest CtsTetheringTest
      atest ConnectivityManagerLegacyTest# \
      testStartUsingNetworkFeature_enableHipri

Change-Id: I02504c0eed10ee4e08c8fbf032951022255ba5fa
Merged-In: I367dff0429f26f266282300edc38637b55eece38
(cherry picked from commit b1c8acf0)