Update kernel to builds 11625976

git log --first-parent -100 --oneline --no-decorate 6e6c5061ba61..6e6c5061ba61:

Test: treehugger
Bug: 291071984
Change-Id: I4a2049d13064ae2b9ce6cd0297f76c7521c52272
diff --git a/microdroid/kernel/android15-6.6/arm64/prebuilt-info.txt b/microdroid/kernel/android15-6.6/arm64/prebuilt-info.txt
new file mode 100644
index 0000000..ba6d07d
--- /dev/null
+++ b/microdroid/kernel/android15-6.6/arm64/prebuilt-info.txt
@@ -0,0 +1,3 @@
+{
+    "kernel-build-id": "11625976"
+}