Require only ACTION_VIEW for web instant apps

When generic intent resolution support was added to instant apps, it
added the requirement that web instant app resolution also require the
BROWSABLE category. This change relaxes that requirement.

Test: manual - sent intent without browsable and observed resolution
Change-Id: I7d4d891484f538b46d37f2c8e7c040b370b46b9e
Fixes: 72835413