WifiSettingsStore: add methods for WifiSavedState

Add methods to get and set WifiSavedState in WifiSettingsStore.  This
change allows us to better test state transitions in WifiController
since we can now mock out the calls easily.

BUG: 28434530
Change-Id: Ie2b6f0311462da0179ecd28665f78f4bf14a02f9
2 files changed
tree: ab859c4a5ed6f0819d52c969b26adddd19c09124
  1. service/
  2. tests/