Revert^2 "Disable concurrent mode when instrumentation is loaded"

import android.annotation.IntDef;

import android.annotation.NonNull;

import android.annotation.TestApi;

import android.app.ActivityThread;

import android.app.Instrumentation;

import android.compat.annotation.UnsupportedAppUsage;

import android.os.Process;

import android.os.UserHandle;

import android.util.proto.ProtoOutputStream;

import dalvik.annotation.optimization.NeverCompile;

import dalvik.system.VMDebug;

import java.io.FileDescriptor;

import java.lang.annotation.Retention;

    private native static void nativeSetFileDescriptorEvents(long ptr, int fd, int events);

    MessageQueue(boolean quitAllowed) {

        mUseConcurrent = UserHandle.isCore(Process.myUid()) && !VMDebug.isDebuggingEnabled();

        // Concurrent mode modifies behavior that is observable via reflection and is commonly used

        // by tests.

        // For now, we limit it to system processes to avoid breaking apps and their tests.

        mUseConcurrent = UserHandle.isCore(Process.myUid());

        // Even then, we don't use it if instrumentation is loaded as it breaks some

        // platform tests.

        final ActivityThread activityThread = ActivityThread.currentActivityThread();

        if (activityThread != null) {

            final Instrumentation instrumentation = activityThread.getInstrumentation();

            mUseConcurrent &= instrumentation == null || !instrumentation.isInstrumenting();

        }

        // We can lift this restriction in the future after we've made it possible for test authors

        // to test Looper and MessageQueue without resorting to reflection.

        mQuitAllowed = quitAllowed;

        mPtr = nativeInit();

    }