Secure MATCH_UNINSTALLED_PACKAGES across users

Introduce a new internal flag MATCH_ANY_USER for genuine uses
of searching through all apps on the device.

Some temporary accommodations for Launchers that reach across
to the work profile until we have a new LauncherApps API to do
that officially.

Bug: 31000380
Test: CTS tests added
Change-Id: I2e43dc49d6c2e11814a8f8d1eb07ef557f31af34

services/core/java/com/android/server/net/NetworkStatsService.java

@@ -1212,7 +1212,8 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
         // Build list of UIDs that we should clean up
         int[] uids = new int[0];
         final List<ApplicationInfo> apps = mContext.getPackageManager().getInstalledApplications(
-                PackageManager.GET_UNINSTALLED_PACKAGES | PackageManager.GET_DISABLED_COMPONENTS);
+                PackageManager.MATCH_ANY_USER
+                | PackageManager.MATCH_DISABLED_COMPONENTS);
         for (ApplicationInfo app : apps) {
             final int uid = UserHandle.getUid(userId, app.uid);
             uids = ArrayUtils.appendInt(uids, uid);