Upgrade to android13-5.15 kernel

... in preparation for the migration to android14-5.15 kernel.

In addition, drop the version suffix from the module names to make
version upgrade less intrusive.

Bug: 233317671
Test: watch TH
Change-Id: Id1fe79c848c5ecb9c3ff5c0ba2c2527e7d907d0e
diff --git a/apex/sign_virt_apex.py b/apex/sign_virt_apex.py
index a1e81d2..7bdbf50 100644
--- a/apex/sign_virt_apex.py
+++ b/apex/sign_virt_apex.py
@@ -363,8 +363,8 @@
 virt_apex_files = {
     'bootloader.pubkey': 'etc/microdroid_bootloader.avbpubkey',
     'bootloader': 'etc/microdroid_bootloader',
-    'boot.img': 'etc/fs/microdroid_boot-5.10.img',
-    'vendor_boot.img': 'etc/fs/microdroid_vendor_boot-5.10.img',
+    'boot.img': 'etc/fs/microdroid_boot.img',
+    'vendor_boot.img': 'etc/fs/microdroid_vendor_boot.img',
     'init_boot.img': 'etc/fs/microdroid_init_boot.img',
     'super.img': 'etc/fs/microdroid_super.img',
     'vbmeta.img': 'etc/fs/microdroid_vbmeta.img',