Add NSD_LIMIT_LABEL_COUNT flag

Bug: 307475137
Test: atest FrameworksNetTests android.net.cts.NsdManagerTest
Merged-In: I48b1dc26f41549ec4afc71f87e98a02ac773430f
Change-Id: Ic4c2e4c0d61b76b1afd556560c18171bdb7a088e
12 files changed