SkQP: add junit app

Change-Id: Ic32eaec6cce1509f07e7cf610717d3b12d335c89
Reviewed-on: https://skia-review.googlesource.com/83921
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index b03f111..96c7623 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1729,6 +1729,19 @@
       ]
     }
   }
+  if (is_android && skia_enable_gpu) {
+    test_app("skqp_app") {
+      is_shared_library = true
+      sources = [
+        "tools/skqp/jni/org_skia_skqp_SkQPRunner.cpp",
+      ]
+      deps = [
+        ":skia",
+        ":skqp_lib",
+      ]
+      libs = [ "android" ]
+    }
+  }
 
   if (skia_enable_gpu) {
     test_lib("sk_app") {