NetworkCapabilities: Added support for TRANSPORT_LOWPAN

This change simply adds a new constant, `TRANSPORT_LOWPAN`, for
identifying low-power wireless networks like Thread.

Bug: b/33073713
Merged-In: Ie4aa77496f8ff466fa1a5fbc556e9c029457a689

(cherry pick from commit 5bc95c59001b973fc359d1e605ff58a1e925d4cb)

Change-Id: I21f9b41b8b31c63ceeb1bc9c965f6da2614c356a

Test: runtest frameworks-net (not in original commit message)
1 file changed
tree: 2c94a85e594ac5185e907f761fbe4dc30cb01f5d
  1. core/
  2. services/
  3. tests/