Revert "Delay start of surfaceflinger until after the Runtime APEX is mounted."

This reverts commit a1ce9e7a.

Reason: static deps to libnativeloader and libnativebridge no longer
exist

Bug: 123403798
Test: device boots to the UI
Test: bootanimation is shown from the very beginning

Change-Id: I40fc87e0189e410e8501837517481f87786d5503