Drop "adb shell" from RunCommandTargetPreparer.

The command should not have "adb shell", as the command is passed to
the device shell by RunCommandTargetPreparer.

Bug: 220385622
Test: atest InputMethodStressTest
Change-Id: I95a90d73e2c26c0ad21d5000b19ff8d805de5250
diff --git a/tests/InputMethodStressTest/AndroidTest.xml b/tests/InputMethodStressTest/AndroidTest.xml
index fc54ca6..5fb260f 100644
--- a/tests/InputMethodStressTest/AndroidTest.xml
+++ b/tests/InputMethodStressTest/AndroidTest.xml
@@ -19,8 +19,8 @@
     <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" />
+        <option name="run-command" value="settings put secure show_ime_with_hard_keyboard 1" />
+        <option name="teardown-command" value="settings delete secure show_ime_with_hard_keyboard" />
     </target_preparer>
 
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">