Don't run testGetAllNetworkStateSnapshots in instant app mode

Instant app mode doesn't have permission to request networks.
Thus, ignore the test in instant app mode.

Bug: 189724761
Test: CtsNetTestCases:ConnectivityManagerTest#testGetAllNetworkStateSnapshots \
      --instant
Original-Change: https://android-review.googlesource.com/1737396
Merged-In: I2897462f4ef6c019b80a3b5159b1c41f397af8de
Change-Id: I2897462f4ef6c019b80a3b5159b1c41f397af8de
1 file changed