Change-Id: Id8693208d2741c55a7b0474d1264f2112019d11f

Convert some ANDROID_MEMBAR_FULL uses into equivalent atomic ops.  A
couple of "bool" had to convert to "int" since we don't have atomic
ops for bools.

Replaced a local implementation of atomic inc with a call to the
atomic inc function.

Change-Id: I948b8080d743552bde014d3a6e716ed2c30ebef8

Fix some SMP correctness issues in the VM:

 - Correct AtomicCache implementation, inserting barriers where needed
   and correcting existing usage.
 - Emphasize that String startup isn't expected to be reentrant, and
   use atomic ops to ensure that we explode if anybody tries it.
 - Use 64-bit quasiatomic ops to manage the "last activity" timer in
   JDWP.  (Also, provide some documented but unimplemented behavior.)
 - Updated the volatile operations in sun.misc.Unsafe to include
   appropriate barriers.

(This does not purport to correct all SMP issues, just some of the
more obvious ones.)

Change-Id: I06957ebcf2724fe7a228b30d00194b9b4808fae0

Replaced VM-local macros for barrier and CAS calls with the actual
versions provided by cutils.

 ATOMIC_CMP_SWAP(addr,old,new) --> android_atomic_release_cas(old,new,addr)

 MEM_BARRIER --> ANDROID_MEMBAR_FULL

Renamed android_quasiatomic* to dvmQuasiAtomic*.

Didn't change how anything works, just the names.

Change-Id: I8c68f28e1f7c9cb832183e0918d097dfe6a2cac8

Change-Id: I1e3d103a7b932ef21acedb6438c0f26b315df28f