Direct share load cutback - minimal/low-risk version.

Hide loading spinnies and make load time short, since we are no longer ever waiting for ChooserServices, just Shortcuts (and Shortcut ranking).

For T (or possibly QPR) need to rip this out entirely - but for S let's keep it low-risk.

Test: atest ChooserActivityTest
Bug: 185292578, 184168028
Change-Id: I47fbb07721472498aa416708791553fb7332dd94
2 files changed