SurfaceFlinger: Handle EGL errors more cleanly

Adds some more safety checking for cases where we get an error while
trying to create the EGLImage. The checking puts the Layer into a
failed state after detecting an error, since the shadow queue may no
longer be synchronized.

Bug: 20957332
Change-Id: I68b4c40eab3e58731b875ed5752f2c7d17f14bcb
2 files changed