Passpoint-r2: OsuLogin Application

This application is launched with the OSU url provided during Provisioning flow
so that user provides the information for subscription.

Bug: 112052266
Test: live tests with passpoint r2 AP
Change-Id: I8f2218876756a069ee3d643f60c9bcda9b853c97
Signed-off-by: Ecco Park <eccopark@google.com>