Migrate frameworks/base/wifi & frameworks/base/packages/OsuLogin

Migrate to packages/modules/Wifi.  This CL will be presubmit tested
once migration is complete.  This CL drops the code from
frameworks/base/wifi and migrated to packages/modules/Wifi.
Also adjusts visibility rules in frameworks/base/Android.bp
Bug: 137323948
Test: TH

Change-Id: Id02e28648e922a30d6a81cf92b39eff4ca3cc002
diff --git a/Android.bp b/Android.bp
index 62ac6e7..3b42181 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1350,6 +1350,7 @@
     visibility: [
         "//frameworks/base/wifi",
         "//frameworks/base/services/net",
+        "//packages/modules/Wifi/framework",
     ],
 }