deflake android.net.cts.NetworkStatsManagerTest#testUidTagStateDetails

Observed failure in manual run on aosp/master cuttlefish:

[759/913] android.net.cts.NetworkStatsManagerTest#testUidTagStateDetails: FAILED (710ms)

STACKTRACE:
java.lang.AssertionError: QueryResult(tag=TAG_NONE state=STATE_FOREGROUND total=256756): 256756 not within 10% of 231272
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.assertTrue(Assert.java:42)
        at android.net.cts.NetworkStatsManagerTest.assertWithinPercentage(NetworkStatsManagerTest.java:743)
        at android.net.cts.NetworkStatsManagerTest.testUidTagStateDetails(NetworkStatsManagerTest.java:802)

256756 / 231272 =~= 1.11019  -->  just over 11% deviation.

Test: TreeHugger
Bug: 283166618
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ie9af706e4f84065050188b1c9b697cccd8509c32