Add instrumented app to JAR path (isolated splits)

The base APK is loaded during normal execution even when isolated splits
are requested. This preserves that behavior during instrumented tests,
which previously skipped the base APK (causing class loading errors).

Test: tested on device with a trivial automated instrumented test
Bug: 146183755
Change-Id: Ia54072ee91b7c06cb4a787a8954ad2e69b322cac
diff --git a/core/java/android/app/LoadedApk.java b/core/java/android/app/LoadedApk.java
index 70262b0..0c5e67c 100644
--- a/core/java/android/app/LoadedApk.java
+++ b/core/java/android/app/LoadedApk.java
@@ -464,6 +464,9 @@
                     || appDir.equals(instrumentedAppDir)) {
                 outZipPaths.clear();
                 outZipPaths.add(instrumentationAppDir);
+                if (!instrumentationAppDir.equals(instrumentedAppDir)) {
+                    outZipPaths.add(instrumentedAppDir);
+                }
 
                 // Only add splits if the app did not request isolated split loading.
                 if (!aInfo.requestsIsolatedSplitLoading()) {
@@ -472,7 +475,6 @@
                     }
 
                     if (!instrumentationAppDir.equals(instrumentedAppDir)) {
-                        outZipPaths.add(instrumentedAppDir);
                         if (instrumentedSplitAppDirs != null) {
                             Collections.addAll(outZipPaths, instrumentedSplitAppDirs);
                         }