Collect lint reports from apps in apexes

Lint reports were only being collected from jars in apexes, not
apps.

Bug: 188772607
Test: mainline_modules_arm64 build
Change-Id: Ie84819343f8b8ab3f43496bbc9b7876d0d0d8e70
Merged-In: Ie84819343f8b8ab3f43496bbc9b7876d0d0d8e70
(cherry picked from commit 8355c1524fbb1d6b7b7a25a13f66feffb1aa7214)
diff --git a/java/app_import.go b/java/app_import.go
index 839051e..3371e8e 100644
--- a/java/app_import.go
+++ b/java/app_import.go
@@ -402,6 +402,10 @@
 	return android.SdkSpecPrivate
 }
 
+func (a *AndroidAppImport) LintDepSets() LintDepSets {
+	return LintDepSets{}
+}
+
 var _ android.ApexModule = (*AndroidAppImport)(nil)
 
 // Implements android.ApexModule