Moving all widget picker tests to instrumentation tests

Bug: 196825541
Test: Presubmit
Change-Id: I946f29baedb2e6b29044f8df1bc73b74e9999efe
diff --git a/tests/Android.bp b/tests/Android.bp
index 37231f9..aeddc4c 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -56,6 +56,7 @@
     resource_dirs: ["res"],
     static_libs: [
         "launcher-aosp-tapl",
+        "androidx.test.core",
         "androidx.test.runner",
         "androidx.test.rules",
         "androidx.test.ext.junit",