Use ext4 for android_gsi image

To match with existing GSI.

Bug: 370351758
Test: m android_gsi
Change-Id: Ie77e30bbe8a2da846bbdcc98648dcae744da0566
diff --git a/target/product/generic/Android.bp b/target/product/generic/Android.bp
index b1c3def..86e5ebe 100644
--- a/target/product/generic/Android.bp
+++ b/target/product/generic/Android.bp
@@ -346,11 +346,6 @@
     ],
 }
 
-filegroup {
-    name: "system_image_erofs_compress_hints.txt",
-    srcs: ["erofs_compress_hints.txt"],
-}
-
 android_filesystem_defaults {
     name: "system_image_defaults",
     partition_name: "system",
@@ -374,11 +369,6 @@
         ],
         libs: [":framework-res{.export-package.apk}"],
     },
-    type: "erofs",
-    erofs: {
-        compressor: "lz4hc,9",
-        compress_hints: ":system_image_erofs_compress_hints.txt",
-    },
     build_logtags: true,
     gen_aconfig_flags_pb: true,
 
@@ -889,4 +879,9 @@
     defaults: ["system_image_defaults"],
     dirs: android_rootdirs,
     symlinks: android_symlinks,
+    type: "erofs",
+    erofs: {
+        compressor: "lz4hc,9",
+        compress_hints: "erofs_compress_hints.txt",
+    },
 }
diff --git a/target/product/gsi/Android.bp b/target/product/gsi/Android.bp
index 1b8f2d7..1d4fc42 100644
--- a/target/product/gsi/Android.bp
+++ b/target/product/gsi/Android.bp
@@ -196,4 +196,5 @@
         "true": true,
         default: false,
     }),
+    type: "ext4",
 }