Override apexes with LOCAL_OVERRIDES_MODULES

APEXes are ETC type, which should be overridden via
LOCAL_OVERRIDES_MODULES. This change fixes a bug that
LOCAL_OVERRIDES_PACKAGES was used for APEXes.

Bug: 140792287
Test: m
Test: add com.google.android.tzdata to PRODUCT_PACKAGES and build.
/system/apex/com.google.android.tzdata.apex exists, but
/system/apex/com.android.tzdata.apex doesn't.

Change-Id: Id65743b36e0b706d6ffd8cae0597cc0a42a83fb7
diff --git a/apex/apex.go b/apex/apex.go
index f03a8f9..4a14364 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -2118,7 +2118,7 @@
 				entries.SetString("LOCAL_MODULE_PATH", p.installDir.ToMakePath().String())
 				entries.SetString("LOCAL_MODULE_STEM", p.installFilename)
 				entries.SetBoolIfTrue("LOCAL_UNINSTALLABLE_MODULE", !p.installable())
-				entries.AddStrings("LOCAL_OVERRIDES_PACKAGES", p.properties.Overrides...)
+				entries.AddStrings("LOCAL_OVERRIDES_MODULES", p.properties.Overrides...)
 			},
 		},
 	}