am 0c51ce0b: Add GlAppSwitchTest  - switches between two Gl-using apps and forces recreating GlContext  - replica island is used for one GL app.  - if something goes wrong and rendering is blocked, watchdog timer     in each app will fire  - fixed a bug in GlPlanetsAc

* commit '0c51ce0b5de50c7a1e8e272182fcbc5fed2481c8':
  Add GlAppSwitchTest  - switches between two Gl-using apps and forces recreating GlContext  - replica island is used for one GL app.  - if something goes wrong and rendering is blocked, watchdog timer     in each app will fire  - fixed a bug in GlPlanetsActivity as the original code freed vertex /     index buffer and did not create after pause resume    : Buffers are just kept to reduce resume time for this test