Lemme just pop my tinfoil hat on and...
OK so
> that the app was being used maliciously to target individual officers for violence and to victimize individuals and property where no police are present.
This line made me more suspicious than usual. I had a very tinfoil-flavoured thought on the matter. What if, realising the bad publicity this would cause, Apple and the Chinese police/army (same thing really at this point) came to an agreement wherein they would stage incidents to warrant the removal of the app. Apple looks like they're protecting cops, China has "examples" of HK citizenry attacking police, which could be then further spun into action against HK protesters.
I'll admit it's a bit out there, but considering how many tricks China is pulling with planting protesters and instigating situations to soften the impact of their violent responses. Hell, at the moment are there even any actual HK citizens in the HK police ? Because it sure seems like the current crop of HK "police" seem very..army'ish