Add tradefed_java_library_host

Add a module type for tradefed libraries that causes an additional
copy to be installed at out/host/linux-x86/tradefed.

Bug: 122332235
Bug: 141877526
Test: m tradefed
Change-Id: Ib7160dd060ad83d2dfb81d6a7106cb0dac98553e
diff --git a/Android.bp b/Android.bp
index dd53818..d06b459 100644
--- a/Android.bp
+++ b/Android.bp
@@ -294,6 +294,7 @@
         "java/support_libraries.go",
         "java/system_modules.go",
         "java/testing.go",
+        "java/tradefed.go",
     ],
     testSrcs: [
         "java/androidmk_test.go",