[cts] fix flakiness

BUG: 229901433
Test: atest IncrementalLoadingProgressTest#testOnPackageLoadingProgressChangedCalledWithPartialLoaded --iterations
Change-Id: I76b323160334c638f884313c7e2561354168e469
diff --git a/hostsidetests/packagemanager/installedloadingprogess/deviceside/src/com/android/tests/loadingprogress/device/LoadingProgressTest.java b/hostsidetests/packagemanager/installedloadingprogess/deviceside/src/com/android/tests/loadingprogress/device/LoadingProgressTest.java
index b8503ac..8e5aa9a 100644
--- a/hostsidetests/packagemanager/installedloadingprogess/deviceside/src/com/android/tests/loadingprogress/device/LoadingProgressTest.java
+++ b/hostsidetests/packagemanager/installedloadingprogess/deviceside/src/com/android/tests/loadingprogress/device/LoadingProgressTest.java
@@ -60,7 +60,7 @@
     private PackageManager mPackageManager;
     private UserHandle mUser;
     private LauncherApps mLauncherApps;
-    private static final int WAIT_TIMEOUT_MILLIS = 1000; /* 1 second */
+    private static final int WAIT_TIMEOUT_MILLIS = 2000; /* 2 second */
     private ConditionVariable mCalled  = new ConditionVariable();
     private final HandlerThread mCallbackThread = new HandlerThread("callback");
     private LauncherAppsCallback mCallback;
@@ -188,4 +188,4 @@
             }
         }
     }
-}
\ No newline at end of file
+}