Fix LRU order in mLruProcesses in ProcessList.java

Binding isolated processes from a client process
in the order of 1,2,3,4,5 was putting the processes
in the LRU list in this order: [LRU]4,3,2,1,5,client[MRU].
But it actually needs to be [LRU]1,2,3,4,5,client[MRU].

This CL fixes that bug.

Bug: 356397711
Change-Id: Ifbda98b20a78fd9b62661c726510319fad692680
Test: atest CtsAppTestCases:ServiceTest#testActivityServiceBindingLru
Flag: EXEMPT bugfix