Add android15-6.1 kernel prebuilts to Android.bp

Bug: 298011555
Test: atest MicrodroidTests
Change-Id: I1fa558494d8fb76c5f69dd5c97b8b27422fc4658
diff --git a/microdroid/kernel/Android.bp b/microdroid/kernel/Android.bp
index db5854d..4f13e7d 100644
--- a/microdroid/kernel/Android.bp
+++ b/microdroid/kernel/Android.bp
@@ -55,6 +55,9 @@
             android14_61: {
                 srcs: ["android14-6.1/arm64/kernel-6.1"],
             },
+            android15_61: {
+                srcs: ["android15-6.1/arm64/kernel-6.1"],
+            },
             // In case release configuration doesn't specify value of the
             // RELEASE_AVF_MICRODROID_KERNEL_VERSION fallback to the kernel we
             // already released.
@@ -74,6 +77,9 @@
             android14_61: {
                 srcs: ["android14-6.1/x86_64/kernel-6.1"],
             },
+            android15_61: {
+                srcs: ["android15-6.1/x86_64/kernel-6.1"],
+            },
             // In case release configuration doesn't specify value of the
             // RELEASE_AVF_MICRODROID_KERNEL_VERSION fallback to the kernel we
             // already released.