Allow refinement of caller-provided chooser targets

More specifically, this provides refinement behavior for any
`SelectableTargetInfo` targets that weren't joined to a
`DisplayResolveInfo` in our intent-resolution step. AFAIK this is
only for the caller's `EXTRA_CHOOSER_TARGETS`.

CTS coverage is provided by the pending ag/21973239 (in the same
topic as this CL).

Bug: 271149302
Test: `atest CtsSharesheetDeviceTest`. New
`testChooserTargetsRefinement` (pending in the same topic) exercises
the fix from this CL, or fails without that fix.

Change-Id: Ie7772953e63fe69dfe080f75eb73ac795693b1ad

1 files changed, 16 insertions, 4 deletions

diff --git a/java/src/com/android/intentresolver/chooser/SelectableTargetInfo.java b/java/src/com/android/intentresolver/chooser/SelectableTargetInfo.java
index e8847edc..74c19e67 100644
--- a/java/src/com/android/intentresolver/chooser/SelectableTargetInfo.java
+++ b/java/src/com/android/intentresolver/chooser/SelectableTargetInfo.java
@@ -195,13 +195,13 @@ public final class SelectableTargetInfo extends ChooserTargetInfo {
 
         mResolvedComponentName = getResolvedComponentName(mSourceInfo, mBackupResolveInfo);
 
-        mAllSourceIntents = getAllSourceIntents(sourceInfo);
-
         mBaseIntentToSend = getBaseIntentToSend(
                 baseIntentToSend,
                 mResolvedIntent,
                 mReferrerFillInIntent);
 
+        mAllSourceIntents = getAllSourceIntents(sourceInfo, mBaseIntentToSend);
+
         mHashProvider = context -> {
             final String plaintext =
                     getChooserTargetComponentName().getPackageName()
@@ -395,12 +395,24 @@ public final class SelectableTargetInfo extends ChooserTargetInfo {
         return sb.toString();
     }
 
-    private static List<Intent> getAllSourceIntents(@Nullable DisplayResolveInfo sourceInfo) {
+    private static List<Intent> getAllSourceIntents(
+            @Nullable DisplayResolveInfo sourceInfo, Intent fallbackSourceIntent) {
         final List<Intent> results = new ArrayList<>();
         if (sourceInfo != null) {
             results.addAll(sourceInfo.getAllSourceIntents());
+        } else {
+            // This target wasn't joined to a `DisplayResolveInfo` result from our intent-resolution
+            // step, so it was provided directly by the caller. We don't support alternate intents
+            // in this case, but we still permit refinement of the intent we'll dispatch; e.g.,
+            // clients may use this hook to defer the computation of "lazy" extras in their share
+            // payload. Note this accommodation isn't strictly "necessary" because clients could
+            // always implement equivalent behavior by pointing custom targets back at their own app
+            // for any amount of further refinement/modification outside of the Sharesheet flow;
+            // nevertheless, it's offered as a convenience for clients who may expect their normal
+            // refinement logic to apply equally in the case of these "special targets."
+            results.add(fallbackSourceIntent);
         }
-        return results;  // TODO: just use our own intent if there's no sourceInfo?
+        return results;
     }
 
     private static ComponentName getResolvedComponentName(