Protecting against trying to launch apps that don't exist

BUG: 74083361

Change-Id: Ia0750bcca2534e794a81f094d5c214af4011c0ce
Test: Locally

tests/AppLaunchWear/src/com/android/tests/applaunch/AppLaunch.java

@@ -229,6 +229,9 @@ public class AppLaunch extends InstrumentationTestCase {
             setLaunchOrder();
 
             for (LaunchOrder launch : mLaunchOrderList) {
+                if (mNameToIntent.get(launch.getApp()) == null) {
+                    continue;
+                }
                 dropCache();
                 String appPkgName = mNameToIntent.get(launch.getApp())
                         .getComponent().getPackageName();