Add an exported flag in integration tests manifest

(partial cherry-pick of internal change:
I4457ff2bd466a4c56fed2570e110f251031c2385)

With b/150232615, we will need an explicit value set for the exported
flag when intent filters are present, as the default behavior is
changing for S+. This change adds the value reflecting the previous
default to the manifest.

These changes were made using an automated tool, the xml file may be
reformatted slightly creating a larger diff. The only "real" change is
the addition of "android:exported" to activities, services, and
receivers that have one or more intent-filters.

Bug: 150232615
Test: TH
Merged-In: I4457ff2bd466a4c56fed2570e110f251031c2385
Change-Id: I65a1ca1678048bbf09edc9a0485b673644c8109d