Revert "Stop preloading EGL/GLES in Zygote"

This reverts commit 9c9cc3e9.

Test: 5x adb shell am start -W -n com.google.android.calculator/com.android.calculator2.Calculator
Bug: 34306111
Change-Id: Iebb3c823613c97c4a2b0f1e72bcea01e4d519fc7