Merge mnc-dr-enso-dev into master

OpenJDK adjustments for master.
- Restored removed libcore.icu.* classes (needed
by the openjdk java.text.* classes). This will be
undone in short future.
- Adjusted java.lang.* and java.lang.reflect.* classes
for native reflection and other changes in master.

Bug: 25758743
Change-Id: Ifbbe5b1e8661138fc32ad24127f76f711dd585b7