SoftAp: fix backup restore fail.

1. load from configuration .txt file should be backup from
WifiConfiguration. The security type should use WifiConfiguration
2. Add band convert for old configuration
3. Fix unit test
4. Add catch exception since old configuration might invalid.

Bug: 146547601
Test: atest frameworks/opt/net/wifi/tests/wifitests
Change-Id: I6ddaad9b19181360612e06e2963316c5bc83b2c7
6 files changed
tree: 994c5360d2ed86246487cb9372a7fcfa9592868f
  1. apex/
  2. service/
  3. PREUPLOAD.cfg