Entry point clean up.

Create set of entry points needed for image methods to avoid fix-up at load time:
 - interpreter - bridge to interpreter, bridge to compiled code
 - jni - dlsym lookup
 - quick - resolution and bridge to interpreter
 - portable - resolution and bridge to interpreter

Fix JNI work around to use JNI work around argument rewriting code that'd been
accidentally disabled.
Remove abstact method error stub, use interpreter bridge instead.
Consolidate trampoline (previously stub) generation in generic helper.
Simplify trampolines to jump directly into assembly code, keeps stack crawlable.
Dex: replace use of int with ThreadOffset for values that are thread offsets.
Tidy entry point routines between interpreter, jni, quick and portable.

Change-Id: I52a7c2bbb1b7e0ff8a3c3100b774212309d0828e
(cherry picked from commit 848871b4d8481229c32e0d048a9856e5a9a17ef9)
diff --git a/compiler/dex/quick/mips/call_mips.cc b/compiler/dex/quick/mips/call_mips.cc
index 846c055..eaae0e1 100644
--- a/compiler/dex/quick/mips/call_mips.cc
+++ b/compiler/dex/quick/mips/call_mips.cc
@@ -247,7 +247,7 @@
   GenBarrier();
   NewLIR0(kMipsCurrPC);  // Really a jal to .+8
   // Now, fill the branch delay slot with the helper load
-  int r_tgt = LoadHelper(QUICK_ENTRYPOINT_OFFSET(pHandleFillArrayDataFromCode));
+  int r_tgt = LoadHelper(QUICK_ENTRYPOINT_OFFSET(pHandleFillArrayData));
   GenBarrier();  // Scheduling barrier
 
   // Construct BaseLabel and set up table base register
@@ -272,7 +272,7 @@
   LockCallTemps();  // Prepare for explicit register usage
   GenNullCheck(rl_src.s_reg_low, rMIPS_ARG0, opt_flags);
   // Go expensive route - artLockObjectFromCode(self, obj);
-  int r_tgt = LoadHelper(QUICK_ENTRYPOINT_OFFSET(pLockObjectFromCode));
+  int r_tgt = LoadHelper(QUICK_ENTRYPOINT_OFFSET(pLockObject));
   ClobberCalleeSave();
   LIR* call_inst = OpReg(kOpBlx, r_tgt);
   MarkSafepointPC(call_inst);
@@ -287,7 +287,7 @@
   LockCallTemps();  // Prepare for explicit register usage
   GenNullCheck(rl_src.s_reg_low, rMIPS_ARG0, opt_flags);
   // Go expensive route - UnlockObjectFromCode(obj);
-  int r_tgt = LoadHelper(QUICK_ENTRYPOINT_OFFSET(pUnlockObjectFromCode));
+  int r_tgt = LoadHelper(QUICK_ENTRYPOINT_OFFSET(pUnlockObject));
   ClobberCalleeSave();
   LIR* call_inst = OpReg(kOpBlx, r_tgt);
   MarkSafepointPC(call_inst);