This allows clients to run multiple instances of the same
manifest service declaration. It only works for isolated
services, to avoid too much abuse temptation. This is part
of the "Chrome site isolation" work, to allow chrome to have
many more render processes running and help it manage them.
Bug: 111434506
Test: atest CtsAppTestCases:ServiceTest
Change-Id: I22e65758678a07075ed32ed6463082ddf846d3a4
27b4d94a07