[CDM][Mobly] Rename multi-device test snippet module for future deprecation.

Bug: 321986767
Test: atest CompanionDeviceManagerMultiDeviceTestCases
Change-Id: I137edadb22002e266792441d4f74fcb070d69212
diff --git a/tests/CompanionDeviceMultiDeviceTests/host/AndroidTest.xml b/tests/CompanionDeviceMultiDeviceTests/host/AndroidTest.xml
index 9d1813f..7c7ef63 100644
--- a/tests/CompanionDeviceMultiDeviceTests/host/AndroidTest.xml
+++ b/tests/CompanionDeviceMultiDeviceTests/host/AndroidTest.xml
@@ -24,12 +24,12 @@
 
     <device name="device1">
         <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
-            <option name="test-file-name" value="cdm_snippet.apk" />
+            <option name="test-file-name" value="cdm_snippet_legacy.apk" />
         </target_preparer>
     </device>
     <device name="device2">
         <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
-            <option name="test-file-name" value="cdm_snippet.apk" />
+            <option name="test-file-name" value="cdm_snippet_legacy.apk" />
         </target_preparer>
     </device>