Always show virtual keyboard in test.

Some emulators have a physical keyboard and the test fails if the
default IME suppresses itself.
Set show_ime_with_hard_keyboard setting to request always showing
virtual keyboard.

Bug: 220385622
Test: atest InputMethodStressTest
Change-Id: Iaf0d30635ca94ae044bb3d3ed771387ce2288cb3
diff --git a/tests/InputMethodStressTest/AndroidTest.xml b/tests/InputMethodStressTest/AndroidTest.xml
index b194010..fc54ca6 100644
--- a/tests/InputMethodStressTest/AndroidTest.xml
+++ b/tests/InputMethodStressTest/AndroidTest.xml
@@ -18,6 +18,11 @@
 
     <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer" />
 
+    <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">
+        <option name="run-command" value="adb shell settings put secure show_ime_with_hard_keyboard 1" />
+        <option name="teardown-command" value="adb shell settings delete secure show_ime_with_hard_keyboard" />
+    </target_preparer>
+
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
         <option name="cleanup-apks" value="true" />
         <option name="test-file-name" value="InputMethodStressTest.apk" />