Increase NNAPI VTS single-test timeout to 20m.

Enlarge the single-test timeout from 1m to 20m.

Bug: 175510656
Bug: 175540503
Bug: 176942480

Test cases:
VtsHalNeuralnetworksV1_0TargetTest
VtsHalNeuralnetworksV1_1TargetTest

Change-Id: I869208c79ff4c1d1928603a5630f456915928957
Merged-In: I869208c79ff4c1d1928603a5630f456915928957
(cherry picked from commit 670532f318107dbd9788267f7177388ffda467f5)
diff --git a/neuralnetworks/1.0/vts/functional/AndroidTest.xml b/neuralnetworks/1.0/vts/functional/AndroidTest.xml
index 13671f9..9dd85ae 100644
--- a/neuralnetworks/1.0/vts/functional/AndroidTest.xml
+++ b/neuralnetworks/1.0/vts/functional/AndroidTest.xml
@@ -28,5 +28,6 @@
     <test class="com.android.tradefed.testtype.GTest" >
         <option name="native-test-device-path" value="/data/local/tmp" />
         <option name="module-name" value="VtsHalNeuralnetworksV1_0TargetTest" />
+        <option name="native-test-timeout" value="20m" />
     </test>
 </configuration>