Revert^2 "Generate a boot image extension for mainline BCP...

Revert submission 2465993-boot-image-mainline-revert

Reason for revert: Relanding the changes

Reverted changes: /q/submissionid:2465993-boot-image-mainline-revert

Change-Id: Ie611cf3a1ff4be7a7beab164f69b4186c474be5c
diff --git a/java/dexpreopt_config_test.go b/java/dexpreopt_config_test.go
index b704d09..cd7f295 100644
--- a/java/dexpreopt_config_test.go
+++ b/java/dexpreopt_config_test.go
@@ -28,8 +28,10 @@
 
 	result := android.GroupFixturePreparers(
 		PrepareForBootImageConfigTest,
+		PrepareApexBootJarConfigs,
 	).RunTest(t)
 
 	CheckArtBootImageConfig(t, result)
 	CheckFrameworkBootImageConfig(t, result)
+	CheckMainlineBootImageConfig(t, result)
 }