Fix sometimes deep link does not show in 2-pane

Settings.ACTION_SETTINGS_LARGE_SCREEN_DEEP_LINK starts
the activity-alias 'DeepLinkHomepageActivity', however,
if Settings app first time (from application cteation) starts
from the activity-alias 'Settings', framework will uses
'Settings' instead of DeepLinkHomepageActivity to match pair
rule. User will see full screen deep link for this case.

This change registers deep link pair rule for both the
activity-alias 'Settings' and 'DeepLinkHomepageActivity'.

Bug: 200131691
Test: manual
      1. Launch Settings from launcher.
      2. Launch Settings from Settings shortcut widget.
      3. Observe if the shortcut page shows in  2-pane.
Change-Id: Ice9d09f3545a02603f529d5d19e621ae82302004