Add @JavaSuppressLint

This is a kind of passthrough annotations for the Java backend. But
adding it as an AIDL annotation is much simpler since it also affects
--checkapi. (JavaSuppressLint can be ignored when checking backward
compatibility.)

Bug: 193460475
Test: aidl_unittests
Change-Id: I640e2268b7bdfeb7c630e3620f5eea20ef354679
diff --git a/aidl_language.h b/aidl_language.h
index bf9322b..d19e425 100644
--- a/aidl_language.h
+++ b/aidl_language.h
@@ -235,6 +235,7 @@
     JAVA_DERIVE,
     JAVA_DEFAULT,
     JAVA_ONLY_IMMUTABLE,
+    JAVA_SUPPRESS_LINT,
     FIXED_SIZE,
     DESCRIPTOR,
     RUST_DERIVE,