Adding Dokka source to AOSP

This is taken from commit 4ff3d4153ca344398bffcdaaa28f1a1f6e76f6ad from
https://github.com/google/dokka, which is Google's customized fork of
Dokka (https://github.com/Kotlin/dokka).

Bug: 135767980
Test: ./gradlew :core:cleanTest :core:test
Test: ./gradlew :runners:gradle-integration-tests:clean :runners:gradle-integration-tests:test

Change-Id: I332d0b522706e353c3837f6308aac1a8340d71d3
diff --git a/core/testdata/java/member.java b/core/testdata/java/member.java
new file mode 100644
index 0000000..d4f4b8d
--- /dev/null
+++ b/core/testdata/java/member.java
@@ -0,0 +1,11 @@
+class Test {
+    /**
+     * Summary for Function
+     * @param name is String parameter
+     * @param value is int parameter
+     * @author yole
+     */
+    public void fn(String name, int value) {
+
+    }
+}
\ No newline at end of file