Merge changes from topics "frameworkswifiapitests-jacoco",...

Merge changes from topics "frameworkswifiapitests-jacoco", "settingsunittests-wifi-systemapi", "sl4a-access-wifi-hidden-apis"

* changes:
  Remove FrameworksWifiApiTests jacoco exclude_filter
  FrameworksWifiApiTests: build against framework-wifi (Attempt 2)
  Convert FrameworksWifiApiTests mk to bp (Attempt 2)
  Give SL4A access to @hide Wifi APIs
  Expose WifiInfo & NetworkSelectionStatus Builders for SettingsUnitTests
  Expose WifiEnterpriseConfig.getClientPrivateKey() for WifiConfigurationProviderTest
  Expose ScanResult constructor for SettingsLibRoboTests
  SettingsLibTests: grant access to Wifi @hide APIs
  TetheringTests: Stop using @hide Wifi P2P APIs