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

java/app_import.go

@@ -410,6 +410,10 @@ func (a *AndroidAppImport) MinSdkVersion(ctx android.EarlyModuleContext) android
 	return android.SdkSpecPrivate
 }
 
+func (a *AndroidAppImport) LintDepSets() LintDepSets {
+	return LintDepSets{}
+}
+
 var _ android.ApexModule = (*AndroidAppImport)(nil)
 
 // Implements android.ApexModule