Allow testing of signal strength

- Let any process with NETWORK_SETTINGS register for signal strength
  wakeup.
- Allow agents registering test networks to assign them a signal
  strength.

Test: NetworkAgentTest
Bug: 139268426
Change-Id: I2b4b89be3e69f4853fd6978d2c8f5c8eb4271f21
2 files changed
tree: 1c0b04de02a1a8a8e134e8545a020181993cecf2
  1. core/
  2. services/
  3. tests/