Add QUERY_ALL_PACKAGES to FrameworksNetTestsLib

Although the launcher should be visible due to the <queries> declaration
in the manifest, there are sometimes flakes indicating that the access
to the package was blocked due to visibility rules.

Try adding QUERY_ALL_PACKAGES to see whether it resolves the flakes.

Bug: 286550950
Test: atest
Change-Id: I24dcf19c040b63fea55f82db412ffcd40670e6fc

tests/unit/AndroidManifest.xml

@@ -49,6 +49,9 @@
     <uses-permission android:name="android.permission.NETWORK_FACTORY" />
     <uses-permission android:name="android.permission.NETWORK_STATS_PROVIDER" />
     <uses-permission android:name="android.permission.CONTROL_OEM_PAID_NETWORK_PREFERENCE" />
+    <!-- Workaround for flakes where the launcher package is not found despite the <queries> tag
+         below (b/286550950). -->
+    <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
 
     <!-- Declare the intent that the test intends to query. This is necessary for
          UiDevice.getLauncherPackageName which is used in NetworkNotificationManagerTest