Revert "set first shipping api to 28"

This reverts commit 5cd78d29de9390720948f96d6822ee47ad455c37.

BUG:  111989951
Reason for revert: broke wear build

Change-Id: I9a902202dc98b5d0c1e72729ca16885fb2f9b400
diff --git a/vendor.mk b/vendor.mk
index 8625069..328b847 100644
--- a/vendor.mk
+++ b/vendor.mk
@@ -17,8 +17,7 @@
 # This file is to configure vendor/data partitions of emulator-related products
 #
 
-PRODUCT_SHIPPING_API_LEVEL := 28
-TARGET_USES_MKE2FS := true
+PRODUCT_SHIPPING_API_LEVEL := 24
 
 # Device modules
 PRODUCT_PACKAGES += \