Partitions are by default read-only.

Bug: 185073512
Test: atest MicrodroidHostTestCases
Change-Id: Icbac38955d5c115dff780b8833ceb622f0c6a909
diff --git a/microdroid/microdroid_cdisk.json b/microdroid/microdroid_cdisk.json
index 591e83b..5721775 100644
--- a/microdroid/microdroid_cdisk.json
+++ b/microdroid/microdroid_cdisk.json
@@ -2,53 +2,43 @@
   "partitions": [
     {
       "label": "misc",
-      "path": "misc.img",
-      "read_only": true
+      "path": "misc.img"
     },
     {
       "label": "boot_a",
-      "path": "microdroid_boot-5.10.img",
-      "read_only": true
+      "path": "microdroid_boot-5.10.img"
     },
     {
       "label": "boot_b",
-      "path": "microdroid_boot-5.10.img",
-      "read_only": true
+      "path": "microdroid_boot-5.10.img"
     },
     {
       "label": "vendor_boot_a",
-      "path": "microdroid_vendor_boot-5.10.img",
-      "read_only": true
+      "path": "microdroid_vendor_boot-5.10.img"
     },
     {
       "label": "vendor_boot_b",
-      "path": "microdroid_vendor_boot-5.10.img",
-      "read_only": true
+      "path": "microdroid_vendor_boot-5.10.img"
     },
     {
       "label": "vbmeta_a",
-      "path": "microdroid_vbmeta.img",
-      "read_only": true
+      "path": "microdroid_vbmeta.img"
     },
     {
       "label": "vbmeta_b",
-      "path": "microdroid_vbmeta.img",
-      "read_only": true
+      "path": "microdroid_vbmeta.img"
     },
     {
       "label": "vbmeta_system_a",
-      "path": "microdroid_vbmeta_system.img",
-      "read_only": true
+      "path": "microdroid_vbmeta_system.img"
     },
     {
       "label": "vbmeta_system_b",
-      "path": "microdroid_vbmeta_system.img",
-      "read_only": true
+      "path": "microdroid_vbmeta_system.img"
     },
     {
       "label": "super",
-      "path": "microdroid_super.img",
-      "read_only": true
+      "path": "microdroid_super.img"
     }
   ]
 }
diff --git a/microdroid/microdroid_cdisk_env.json b/microdroid/microdroid_cdisk_env.json
index f43c4b1..b0fbe44 100644
--- a/microdroid/microdroid_cdisk_env.json
+++ b/microdroid/microdroid_cdisk_env.json
@@ -2,8 +2,7 @@
   "partitions": [
     {
       "label": "uboot_env",
-      "path": "uboot_env.img",
-      "read_only": true
+      "path": "uboot_env.img"
     }
   ]
 }