am: Block MEDIA_MOUNTED broadcast for restricted apps

This blocks ACTION_MEDIA_MOUNTED for victims of "strict standby" and
"force background freezer". Some apps e.g. MobileQQ are using this for
boot completed notification, which could block the process of serialized
broadcast for quite a while.

Also move `=` to `.equals()` because the latter one is the proper way
for comparing strings, although the former one is just working fine
statically within system server context.

Change-Id: I46a85e7d9f386b10e6001697cf98f77ff058c3e7
Signed-off-by: LibXZR <i@xzr.moe>
Signed-off-by: Adithya R <gh0strider.2k18.reborn@gmail.com>
Signed-off-by: Dmitrii <bankersenator@gmail.com>
Signed-off-by: Hưng Phan <phandinhhungvp2001@gmail.com>

Author: libxzr

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

@@ -1147,8 +1147,9 @@ static String broadcastDescription(BroadcastRecord r, ComponentName component) {
     }
 
     private boolean isBootCompletedIntent(Intent intent) {
-        return intent.getAction() == Intent.ACTION_BOOT_COMPLETED ||
-                intent.getAction() == Intent.ACTION_LOCKED_BOOT_COMPLETED;
+        return Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction()) ||
+                Intent.ACTION_LOCKED_BOOT_COMPLETED.equals(intent.getAction()) ||
+                Intent.ACTION_MEDIA_MOUNTED.equals(intent.getAction());
     }
 
     final void processNextBroadcastLocked(boolean fromMsg, boolean skipOomAdj) {
@@ -1530,7 +1531,7 @@ final void processNextBroadcastLocked(boolean fromMsg, boolean skipOomAdj) {
         if (isBootCompletedIntent(r.intent) &&
                 mService.shouldSkipBootCompletedBroadcastForPackage(
                         info.activityInfo.applicationInfo)) {
-            Slog.i(TAG, "BOOT_COMPLETED broadcast skipped because of strict standby for "
+            Slog.i(TAG, "Boot broadcast skipped because of strict standby for "
                     + info.activityInfo.applicationInfo.packageName);
             skip = true;
         }