Revert "Lazily preload secondary zygote resources."

This reverts commit e5aee79e9c.

Given recent improvements to boot timing, and higher paralellization,
the lazy preloading of zygote resources makes boot time slightly slower
by ~100-250ms. Therefore, the change is being reverted until we can do
it properly and defer it to a later point in the boot process. This work
is being tracked by b/34810190

BEFORE
------
successive-online : 17290.0,17633.0,17329.0,17655.0,16802.0,16888.0,17645.0,17369.0,17572.0,16932.0,
successive-online_avg : 17311.5
successive-boot : 24834.0,25119.0,25122.0,25091.0,25617.0,25535.0,25047.0,27462.0,25088.0,25648.0,
successive-boot_avg : 25456.3

AFTER
-----
successive-online : 16973.0,16530.0,17015.0,17953.0,17367.0,17098.0,16887.0,17377.0,18039.0,16742.0,
successive-online_avg : 17198.1
successive-boot : 24921.0,25622.0,25781.0,25449.0,25128.0,24774.0,24554.0,25029.0,24544.0,25809.0,
successive-boot_avg : 25161.1

Test: Boot timings collected with tradefed harness.
Bug: 34810190
Change-Id: I9a6dd5ce31bda067e74fc088b057711fa4a7a0fb

rootdir/init.zygote64_32.rc

@@ -13,7 +13,7 @@ service zygote /system/bin/app_process64 -Xzygote /system/bin --zygote --start-s
     onrestart restart wificond
     writepid /dev/cpuset/foreground/tasks /dev/stune/foreground/tasks
 
-service zygote_secondary /system/bin/app_process32 -Xzygote /system/bin --zygote --socket-name=zygote_secondary --enable-lazy-preload
+service zygote_secondary /system/bin/app_process32 -Xzygote /system/bin --zygote --socket-name=zygote_secondary
     class main
     priority -20
     user root