问题概要： 现在dscreen 3568 source端在统一渲染和开eglimage的情况下关闭重连dscreen时free内存会有30M左右的泄漏，怀疑是renderservice造成的。在分离渲染的情况下就没有
 dscreen source端平台：3568-dayu, sdk_version = "3.2.12.5"，screen size: 1920x1080
 
 1.统一渲染和开eglimage的graphic_config.gni:
 declare_args() {
  graphic_standard_feature_bootanimation_enable = true
  graphic_standard_feature_ace_enable_gpu = true
  graphic_standard_feature_color_gamut_enable = false
  graphic_standard_feature_rs_enable_eglimage = true
  graphic_standard_feature_rs_enable_uni_render = true
  graphic_standard_feature_wuji_enable = false
  graphic_standard_feature_freemem_enable = false
  graphic_standard_feature_enable_afbc = true
}

通过app连续5次重连dscreen再断开时的top数据（请注意Mem的free列和render_service的VIRT（第5）列）
  Mem:  2002204K total,  1115360K used,   886844K free,   1314816 buffers
  550 system       -2  -8 380M 196M 160M S  7.3  10.0   0:16.85 render_service
  Mem:  2002204K total,  1146664K used,   855540K free,   1314816 buffers
  550 system       -2  -8 420M 197M 160M S  0.1  10.0   0:20.95 render_service
  Mem:  2002204K total,  1180808K used,   821396K free,   1314816 buffers
  550 system       -2  -8 460M 197M 160M S  0.8  10.0   0:23.35 render_service
  Mem:  2002204K total,  1209544K used,   792660K free,   1314816 buffers
  550 system       -2  -8 500M 197M 160M S  0.1  10.0   0:25.87 render_service
  Mem:  2002204K total,  1243456K used,   758748K free,   1314816 buffers
  550 system       -2  -8 540M 198M 160M S  1.0  10.1   0:29.20 render_service
关闭app后top数据
  Mem:  2002204K total,  1246328K used,   755876K free,   1314816 buffers 
  550 system       -2  -8 567M 225M 198M S  1.0  11.4   0:33.42 render_service

2.分离渲染的graphic_config.gni:
 declare_args() {
  graphic_standard_feature_bootanimation_enable = true
  graphic_standard_feature_ace_enable_gpu = true
  graphic_standard_feature_color_gamut_enable = false
  graphic_standard_feature_rs_enable_eglimage = false
  graphic_standard_feature_rs_enable_uni_render = false
  graphic_standard_feature_wuji_enable = false
  graphic_standard_feature_freemem_enable = false
  graphic_standard_feature_enable_afbc = false
}

通过app连续5次重连dscreen再断开时的top数据（请注意Mem的free列和render_service的VIRT（第5）列）
  Mem:  2002204K total,  1230024K used,   772180K free,   1314816 buffers
  554 system       -2  -8 173M  48M  34M S  0.0   2.4   1:30.12 render_service
  Mem:  2002204K total,  1232072K used,   770132K free,   1314816 buffers
  554 system       -2  -8 173M  48M  34M S  0.1   2.4   1:34.74 render_service
  Mem:  2002204K total,  1232852K used,   769352K free,   1314816 buffers
  554 system       -2  -8 173M  48M  34M S  0.6   2.4   1:44.29 render_service
  Mem:  2002204K total,  1233448K used,   768756K free,   1314816 buffers
  554 system       -2  -8 173M  48M  34M S  0.0   2.4   1:50.86 render_service
  Mem:  2002204K total,  1233932K used,   768272K free,   1314816 buffers
  554 system       -2  -8 173M  48M  34M S  0.1   2.4   1:55.89 render_service
关闭app后top数据
  Mem:  2002204K total,  1183696K used,   818508K free,   1314816 buffers
  554 system       -2  -8 154M  48M  34M S  0.1   2.4   1:59.20 render_service