ChooserAdapter: fix NPE for non-work profiles

For some non-work profiles (Communal, and maybe Private), the
getListAdapterForUserHandle is returning null. The method is indeed
nullable. But we run getCount on it without doing a null-check,
causing crashes for such profiles.

This previously couldn't have happened, since shouldShowTabs() returns
false in these cases, and the evaluation was skipped; however,
ag/I8273cf365a1e00b1acff4030086f1a044ad7531f moved that check to later,
so we are hitting this problem.

Bug: 322523699
Bug: 320369524
Bug: 320615143
Bug: 322497953

Test: atest IntentResolver-tests-unit
Change-Id: I82303d6a6a1be1066f5c3e05c53f6a70d486bf5a

1 files changed, 3 insertions, 2 deletions

diff --git a/java/src/com/android/intentresolver/ChooserActivity.java b/java/src/com/android/intentresolver/ChooserActivity.java
index 82e46a57..e30c198a 100644
--- a/java/src/com/android/intentresolver/ChooserActivity.java
+++ b/java/src/com/android/intentresolver/ChooserActivity.java
@@ -1651,8 +1651,9 @@ public class ChooserActivity extends Hilt_ChooserActivity implements
         if (!shouldShowContentPreview()) {
             return false;
         }
-        boolean isEmpty = mMultiProfilePagerAdapter.getListAdapterForUserHandle(
-                UserHandle.of(UserHandle.myUserId())).getCount() == 0;
+        ResolverListAdapter adapter = mMultiProfilePagerAdapter.getListAdapterForUserHandle(
+                UserHandle.of(UserHandle.myUserId()));
+        boolean isEmpty = adapter == null || adapter.getCount() == 0;
         return (mFeatureFlags.scrollablePreview() || shouldShowTabs())
                 && (!isEmpty || shouldShowContentPreviewWhenEmpty());
     }