音视频播放能力集MgPlayerSupporter

MgPlayerSupporter是供上层获取播放能力集的类，主要提供当前最高播放倍速、最低播放倍速、泛高清支持情况、编码格式支持情况、高品质音效支持情况等。

提示

以上播放能力项受硬件设备、播放内核、媒资情况、远程开关配置等多因素影响，不同播放时机及配置项会影响返回，这些能力项并不是完全静态的，但一般情况下变动不大。

函数名字	返回值实例	函数功能	自研播放器	系统播放器
getMinSpeed(): string	'0.75'	获取最小支持倍速	❌	✅
getMaxSpeed()	'2.0'	获取最大支持倍速	❌	✅
getExdefJsonStr(): string	{"support":"1","version":"3","h264":{"support":"0","sdr":{"max_def":"0x0","max_def_fps":"0"},"hdr":{"support":"0","bit_depth":"10","max_def":"0x0","max_def_fps":"0","hdr_type":"0"}},"h265":{"support":"0","sdr":{"max_def":"0x0","max_def_fps":"0"},"hdr":{"support":"0","bit_depth":"10","max_def":"0x0","max_def_fps":"0","hdr_type":"0"}},"sceen_size":"0x0","sceen_fps":"0","screen_hdr_type":"0","support_wanos":"0","support_3da":"0"}	获取hdr、wanos等能力封装集	✅	✅
getSupportHDST(): string	'h264,h265'	获取h264\h265支持情况	✅	✅