Fix issue #11157301: Bad process stats when apps are binding to long-running services

We now treat PROCESS_STATE_TOP more specially.  When a process has another
client bound to it that is TOP, it will only allow itself to go in the TOP
state if it is not already running for another significant reason.

Change-Id: Ia3856406bd481bf6e98d55100a5513ccf4060e0d