Use sharedUserId as package name if there are collisions

Per-UID Summary (cpu_time, % of total cpu_time, call_count, exception_count, package/uid):
    13095032  43%    44663   0 shared:com.package.shareduid/u0a35
     8872156  29%     5831   0 com.package2/u0a75
     2379684   8%     1549   0 com.package3/u0a23

Test: manual dumpsys binder_calls_stats
Test: BinderCallsStatsTest + BinderCallsStatsPerfTest
Bug: 75318418
Change-Id: I9b122252d8f8d3d2297bc71d46d5944c4402fd5e