Update prebuilts to 7020263.

Test: Treehugger
Bug: 172683403
Change-Id: I6241b6612bf3584eda6b5051715cda7c6ff2d8f5
diff --git a/boot-userdebug.img b/boot-userdebug.img
new file mode 100644
index 0000000..ed1622d
--- /dev/null
+++ b/boot-userdebug.img
Binary files differ