Revert^2 "Reimplement ojluni JNI_OnLoad from scratch."

This reverts commit 70cd18f6.

The initialization order has been fixed by moving Float,
Double and System to the beginning as they are needed for
resizing StringBuilder's internal buffer, used for class
initializers of some other classes, notably Inet*Addrees.

Also change libbase to be dynamically linked to avoid
multiple definitions of gMinimumLogSeverity which caused
some tests to fail as dalvikvm would initialize a copy in
the libbase.so but JVM_Exit() would use its own copy in
the libopenjdkd.so, ignoring the requested verbosity.

Test: Pixel 2 XL boots.
Test: cts-tradefed run cts --m vm-tests-tf
Test: cts-tradefed run cts -d -m CtsLibcoreTestCases
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: Repeat previous 2 tests without preloaded-classes.

(cherry picked from commit 1ba8b2ff)

Change-Id: I2e5ca42615136ad77c368fb6ab75d18dc0734800
Merged-In: I4bb977e00f5c0028cafb000d70159043c5ec9fb9