Sets up WallpaperPicker2 tests to run as presubmits

Fixes: 248601385
Test: None
Change-Id: Ifbde41fba28ce295694fbe3ee6efbb9302755154
diff --git a/TEST_MAPPING b/TEST_MAPPING
new file mode 100644
index 0000000..d413e09
--- /dev/null
+++ b/TEST_MAPPING
@@ -0,0 +1,12 @@
+{
+  "presubmit": [
+    {
+      "name": "WallpaperPicker2Tests",
+      "options": [
+        {
+          "exclude-annotation": "org.junit.Ignore"
+        }
+      ]
+    }
+  ]
+}