Mitigate Intent Capturing vulnerability

ResolverActivity now identifies that the intent is a browsable intent,
and thus omits the Always button and replaces it with a settings button
tha can be used to configure the user's wanted behaviour.
Also prints out a message explaining that the user is giving the app
an access to open URLs from a specific host.

Bug: 116610086
Test: manually tested on device (Pixel 2XL) - will add unit test to
document behaviour

Change-Id: I81988b9a4d082bc1e6491186d39532fd283f2ede