Fix fullscreen player requiring two clicks to resume from paused state

[Copilot]

After pausing playback and entering fullscreen, the player required two clicks on the play button to resume — introduced in the "Request audio focus on resume from pause" change.

Root Cause

When the fullscreen player resumes from CURRENT_STATE_PAUSE, it calls start() then requestAudioFocus(). Since the original player still holds audio focus (not released on pause), Android fires AUDIOFOCUS_LOSS_TRANSIENT on the original player's manager. The callback then called getGSYVideoManager().listener().onVideoPause() — but listener() returns the fullscreen player (now the active listener), immediately re-pausing it.

Fix

Add a listener == GSYVideoView.this identity check in both onAudioFocusLoss() and onAudioFocusLossTransient() so a player only acts on focus loss when it is the current active listener:

// Before
if (listener != null && getGSYVideoManager().isPlaying()) {
    listener.onVideoPause();
}

// After
if (listener != null && listener == GSYVideoView.this && getGSYVideoManager().isPlaying()) {
    listener.onVideoPause();
}

This preserves correct behavior for all other scenarios (external app interruptions, fullscreen player itself being interrupted) while preventing a stale player's focus-loss callback from pausing its successor.

Original prompt

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This section details on the original issue you should resolve

<issue_title>切换全屏之后需要按两下播放才能播放</issue_title>
<issue_description>点击暂停进入全屏，然后需要点击两下播放视频才能正常播放。</issue_description>

<agent_instructions>点击简单播放，选择简单列表1，然后点视频播放，点击暂停，再点击全屏，然后需要点击两下才开始播放。v10.2.1是没有问题的，v11.3.0才有这个问题。</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@CarGuo Demo哪里复现

• Fixes 切换全屏之后需要按两下播放才能播放 #4227

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[Copilot]

Pull request overview

Fixes a regression where resuming playback in fullscreen after pausing requires two clicks, caused by a previous (non-active) player instance receiving an audio-focus loss callback and pausing the new fullscreen listener.

Changes:

• Add an identity check (listener == GSYVideoView.this) before pausing on onAudioFocusLoss() to ensure only the active listener reacts.
• Add the same identity check for onAudioFocusLossTransient() to prevent stale callbacks from pausing the fullscreen player.
• Add inline comments explaining the fullscreen-switch audio focus edge case.

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[Copilot]

The listener != null && listener == GSYVideoView.this check duplicates the existing isCurrentMediaListener() helper later in this class. Using the helper here would reduce duplication and keep the “current listener” definition consistent in one place.

[Copilot]

The comment says only the current active player responds to audio focus loss, but when mReleaseWhenLossAudio is true the code calls releaseVideos() without verifying this view is still the current GSYVideoManager listener. If an old (non-active) view instance still receives AUDIOFOCUS_LOSS, it could release the active playback. Consider guarding the release path with the same listener == this / isCurrentMediaListener() check (or adjust the comment to match behavior).