Build Intents at index time

In order to index Intents into Icing, they need to be
built at Index time rather than at Search time.

Test: make RunSettingsRoboTests
Bug: 36443380
Change-Id: Ia731b5038380bb658232e2e175f52a81d86d7e02

tests/robotests/src/com/android/settings/search/InlineSwitchViewHolderTest.java

@@ -117,7 +117,7 @@ public class InlineSwitchViewHolderTest {
         builder.addTitle(TITLE)
                 .addSummary(SUMMARY)
                 .addRank(1)
-                .addPayload(new InlineSwitchPayload("", 0, null))
+                .addPayload(new InlineSwitchPayload("", 0, null, null))
                 .addBreadcrumbs(new ArrayList<>())
                 .addIcon(mIcon)
                 .addPayload(mPayload);