Revert "Revert "Load app images""

This reverts commit 1bc977cf2f8199311a97f2ba9431a184540e3e9c.

Bug: 22858531

Change-Id: Ide00bf3a73a02cba3bb364177204ad1b13f70295
diff --git a/compiler/driver/compiler_driver.cc b/compiler/driver/compiler_driver.cc
index d021525..818d50a 100644
--- a/compiler/driver/compiler_driver.cc
+++ b/compiler/driver/compiler_driver.cc
@@ -730,8 +730,8 @@
 
 bool CompilerDriver::IsImageClass(const char* descriptor) const {
   if (!IsBootImage()) {
-    // NOTE: Currently unreachable, all callers check IsImage().
-    return false;
+    // NOTE: Currently only reachable from InitImageMethodVisitor for the app image case.
+    return true;
   } else {
     return image_classes_->find(descriptor) != image_classes_->end();
   }