Log taps on PS container buttons

Log taps on space locked/unlocked, settings
buttons

PDD: https://eldar.corp.google.com/assessments/873128385/revisions/1

Test: logcat StatsLog, output
https://paste.googleplex.com/6250774946906112
Bug: 314933661
Flag: ACONFIG com.android.launcher3.Flags.enable_private_space TEAMFOOD
Change-Id: I528443ba56a0db144ce613ea8d41426b6ede434d