Frameworks: Clean up ProfilerInfo

Use a ProfilerInfo object in ActivityManagerService to reduce the
number of exposed fields. In preparation for adding an agent during
startup.

Bug: 62445317
Test: m
Test: Device boots
Test: Manual test for profiling
Test: cts/hostsidetests/services/activityandwindowmanager/util/run-test CtsServicesHostTestCases android.server.cts.ActivityManagerAmProfileTests
Change-Id: I5fa347ded760c263a8ce3754bb2631205ea7b4b8