Remove some unused members

import perfetto.protos.TrackDescriptorOuterClass.TrackDescriptor;

import perfetto.protos.TrackEventConfigOuterClass.TrackEventConfig;

import perfetto.protos.TrackEventOuterClass.EventCategory;

import perfetto.protos.TrackEventOuterClass.EventName;

import perfetto.protos.TrackEventOuterClass.TrackEvent;

import java.util.List;

            DeviceFlagsValueProvider.createCheckFlagsRule(

                    InstrumentationRegistry.getInstrumentation().getUiAutomation());

    private static final String TAG = "PerfettoTraceTest";

    private static final String FOO = "foo";

    private static final String BAR = "bar";

    private static final String TEXT_ABOVE_4K_SIZE =

            new String(new char[8192]).replace('\0', 'a');

    private static final Category FOO_CATEGORY = new Category(FOO);

    private static final int MESSAGE = 1234567;

    private static final int MESSAGE_DELAYED = 7654321;

    private final Set<String> mCategoryNames = new ArraySet<>();

    private final Set<String> mEventNames = new ArraySet<>();

    private final Set<String> mDebugAnnotationNames = new ArraySet<>();

    private final Set<String> mTrackNames = new ArraySet<>();

        FOO_CATEGORY.register();

        mCategoryNames.clear();

        mEventNames.clear();

        mDebugAnnotationNames.clear();

        mTrackNames.clear();

    }

        for (EventCategory cat : data.getEventCategoriesList()) {

            mCategoryNames.add(cat.getName());

        }

        for (EventName ev : data.getEventNamesList()) {

            mEventNames.add(ev.getName());

        }

        for (DebugAnnotationName dbg : data.getDebugAnnotationNamesList()) {

            mDebugAnnotationNames.add(dbg.getName());

        }