manifest_fixer: rename to --prefer-code-integrity

During code review, the name change was suggested.

Test: local CTS passed
Bug: 112037137
Change-Id: I7eb25210afb45c7477b0d606574048a15c9c721d
diff --git a/dexpreopt/dexpreopt_test.go b/dexpreopt/dexpreopt_test.go
index 5265248..fef85a7 100644
--- a/dexpreopt/dexpreopt_test.go
+++ b/dexpreopt/dexpreopt_test.go
@@ -66,7 +66,7 @@
 	DexLocation:            "",
 	BuildPath:              "",
 	DexPath:                "",
-	PreferIntegrity:        false,
+	PreferCodeIntegrity:    false,
 	UncompressedDex:        false,
 	HasApkLibraries:        false,
 	PreoptFlags:            nil,