The current suffixes are: (WindowManagerPolicy.java)
* <dt> Ti <dd> Called from the input thread. This is the thread that
* collects pending input events and dispatches them to the appropriate window.
* It may block waiting for events to be processed, so that the input stream is
* properly serialized.
* <dt> Tq <dd> Called from the low-level input queue thread. This is the
* thread that reads events out of the raw input devices and places them
* into the global input queue that is read by the <var>Ti</var> thread.
* This thread should not block for a long period of time on anything but the
* key driver.
* <dt> Lw <dd> Called with the main window manager lock held. Because the
* window manager is a very low-level system service, there are few other
* system services you can call with this lock held. It is explicitly okay to
* make calls into the package manager and power manager; it is explicitly not
* okay to make calls into the activity manager or most other services. Note that
* {@link android.content.Context#checkPermission(String, int, int)} and
* variations require calling into the activity manager.
* <dt> Li <dd> Called with the input thread lock held. This lock can be
* acquired by the window manager while it holds the window lock, so this is
* even more restrictive than <var>Lw</var>
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