Manually update microdroid kernel version into common-android14-6.1

kernel build ID is 9478469

Bug: 262792308
Test: atest MicrodroidHostTests

Change-Id: If30f8e4f69c9767078a02675f071099d7b1919df
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index c62db2d..b898097 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -247,10 +247,10 @@
     kernel_prebuilt: "empty_kernel",
     arch: {
         arm64: {
-            kernel_prebuilt: ":microdroid_kernel_prebuilts-5.15-arm64",
+            kernel_prebuilt: ":microdroid_kernel_prebuilts-6.1-arm64",
         },
         x86_64: {
-            kernel_prebuilt: ":microdroid_kernel_prebuilts-5.15-x86_64",
+            kernel_prebuilt: ":microdroid_kernel_prebuilts-6.1-x86_64",
         },
     },
 
@@ -588,11 +588,11 @@
     enabled: false,
     arch: {
         arm64: {
-            src: ":microdroid_kernel_prebuilts-5.15-arm64",
+            src: ":microdroid_kernel_prebuilts-6.1-arm64",
             enabled: true,
         },
         x86_64: {
-            src: ":microdroid_kernel_prebuilts-5.15-x86_64",
+            src: ":microdroid_kernel_prebuilts-6.1-x86_64",
             enabled: true,
         },
     },