Don't bundle compat framework annotations

The compat framework annotations are source retention only, so don't
need to be bundled in the bootclasspath.

Test: atest CtsStrictJavaPackagesTestCases:android
Bug: 175183598
Change-Id: I244518c8d226aad3d676be0e3aa45bcdb5a1a59b
diff --git a/android_icu4j/jarjar-rules.txt b/android_icu4j/jarjar-rules.txt
new file mode 100644
index 0000000..70753c5
--- /dev/null
+++ b/android_icu4j/jarjar-rules.txt
@@ -0,0 +1 @@
+zap android.compat.annotation.**
\ No newline at end of file