hwui: Update configuration for 2GB/1080p devices

Change-Id: I73357a35bee22d76d3fe8a98ece91c5c9d19371d
Revert "Rework BOARD_EGL_NEEDS_LEGACY_FB implementation"

This reverts commit 1c01d2b237a8bad651be594b8e67db6abd24c57f, it's
not reliable on Mali