Add tron metric logging

- one tracking id for every picker type

Bug: 73952488
Test: m RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.datetime.timezone
Change-Id: Ia487f1657d6ed1f0fb40b61f39f4a47c38bd6179

src/com/android/settings/datetime/timezone/FixedOffsetPicker.java

@@ -18,6 +18,7 @@ package com.android.settings.datetime.timezone;
 
 import android.icu.util.TimeZone;
 
+import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.R;
 import com.android.settings.datetime.timezone.model.TimeZoneData;
 
@@ -42,6 +43,11 @@ public class FixedOffsetPicker extends BaseTimeZoneInfoPicker {
                 R.string.search_settings, false, false);
     }
 
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.SETTINGS_ZONE_PICKER_FIXED_OFFSET;
+    }
+
     @Override
     public List<TimeZoneInfo> getAllTimeZoneInfos(TimeZoneData timeZoneData) {
         return loadFixedOffsets();