Send onUnlockUser() before PRE_BOOT broadcasts.

Before this change, a PRE_BOOT_COMPLETED receiver could try calling
back into the system to ask for AccountManager details, only to be
told the user wasn't unlocked yet.  If the broadcast code was probing
in a loop, it would force us to wait around for the 60-second ANR
timeout.  Since typical devices have ~7 PRE_BOOT receivers, this
would delay BOOT_COMPLETED and other operations, like mounting the
SD card, for up to 7 minutes.

Bug: 28024024

Change-Id: Ibf8611e6fe94b0deb5ae5715c86f897ff6779088

services/core/java/com/android/server/am/UserController.java

@@ -260,6 +260,9 @@ final class UserController {
                 mUserManager.onBeforeUnlockUser(userId);
                 progress.setProgress(20);
 
+                // Dispatch unlocked to system services
+                mHandler.sendMessage(mHandler.obtainMessage(SYSTEM_USER_UNLOCK_MSG, userId, 0));
+
                 // Send PRE_BOOT broadcasts if fingerprint changed
                 final UserInfo info = getUserInfo(userId);
                 if (!Objects.equals(info.lastLoggedInFingerprint, Build.FINGERPRINT)) {
@@ -302,9 +305,6 @@ final class UserController {
                 // Remember that we logged in
                 mUserManager.onUserLoggedIn(userId);
 
-                // Dispatch unlocked to system services
-                mHandler.sendMessage(mHandler.obtainMessage(SYSTEM_USER_UNLOCK_MSG, userId, 0));
-
                 // Dispatch unlocked to external apps
                 final Intent unlockedIntent = new Intent(Intent.ACTION_USER_UNLOCKED);
                 unlockedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId);