Merge "SoundPool: Enable multithreaded track start" into main

// In R, we change this to true, as it is the correct way per SoundPool documentation.

static constexpr bool kStealActiveStream_OldestFirst = true;

// kPlayOnCallingThread = true prior to R.

// Changing to false means calls to play() are almost instantaneous instead of taking around

// ~10ms to launch the AudioTrack. It is perhaps 100x faster.

static constexpr bool kPlayOnCallingThread = true;

static constexpr bool kPlayOnCallingThread = false;

// Amount of time for a StreamManager thread to wait before closing.

static constexpr int64_t kWaitTimeBeforeCloseNs = 9 * NANOS_PER_SECOND;

public:

    JavaThread(std::function<void()> f, const char *name)

        : mF{std::move(f)} {

        createThreadEtc(staticFunction, this, name);

        createThreadEtc(staticFunction, this, name, ANDROID_PRIORITY_AUDIO);

    }

    JavaThread(JavaThread &&) = delete; // uses "this" ptr, not moveable.