BoardConfigCommon: disable EGL hibernation

"Disable EGL hibernation due to jank

Hibernating EGL takes a long time (>100 ms) and blocks all other
rendering. During window animations, the outgoing activity begins
hibernation before the animation stops, causing visible stutter.
Hibernation is still available by setting 'BOARD_ALLOW_EGL_HIBERNATION
:= true' in the devices BoardConfig.mk"

https://android.googlesource.com/platform/frameworks/native/+/201f3b2da572eb27b9d4b3131e6d8c3c92a13de8