[initrd] Adjust the initrd partition names in kernel footer

These names are not used anywhere yet.

Test: atest libpvmfw_avb.test
Bug: 260821553
Change-Id: I090509b4e04311c835c35a7eb21cce739ce19356
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index b46f112..c62db2d 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -544,7 +544,7 @@
 avb_gen_vbmeta_image {
     name: "microdroid_initrd_normal_hashdesc",
     src: ":microdroid_initrd_normal",
-    partition_name: "vbmeta_initrd_normal",
+    partition_name: "initrd_normal",
     salt: initrd_normal_salt,
     enabled: false,
     arch: {
@@ -564,7 +564,7 @@
 avb_gen_vbmeta_image {
     name: "microdroid_initrd_debug_hashdesc",
     src: ":microdroid_initrd_debuggable",
-    partition_name: "vbmeta_initrd_debug",
+    partition_name: "initrd_debug",
     salt: initrd_debug_salt,
     enabled: false,
     arch: {