Set EGL_MUTABLE_RENDER_BUFFER_BIT_KHR on surface in mutable buffer CTS test.

Setting EGL_MUTABLE_RENDER_BUFFER_BIT_KHR as part of the
EGL_KHR_mutable_render_buffer spec.

Fixes: 28767759
Change-Id: I6fd9c0146e9574b8875e77b5c7fc9249bf62af9e
2 files changed