Add support for tests to declare runtime hints.

bug:21762834
Change-Id: I11f3e6ecb026dcbbb8c73c750c7a70d8a15d81fb
diff --git a/hostsidetests/ui/AndroidTest.xml b/hostsidetests/ui/AndroidTest.xml
index 1a59817..7d17e2b 100644
--- a/hostsidetests/ui/AndroidTest.xml
+++ b/hostsidetests/ui/AndroidTest.xml
@@ -16,5 +16,6 @@
 <configuration description="Config for CTS UI host test cases">
     <test class="com.android.compatibility.common.tradefed.testtype.JarHostTest" >
         <option name="jar" value="CtsUiHostTestCases.jar" />
+        <option name="runtime-hint" value="2m" />
     </test>
 </configuration>