Collapse ART's AbstractMethod class into Executable

After the OpenJDK 8 pull there is now a common base class
for Method and Constructor that can be used instead.

Methods that are abstract on Executable but on Android
were implemented in AbstractMethod are now consistently
renamed to "{method}Internal", declared final and
given package-protected access.

For consistency with all other private, natively
implemented methods, the method getDeclaredAnnotations()
has been renamed getDeclaredAnnotationsNative().

Bug: 28666126
Bug: 31052885
Test: make test-art-host and cts run of CtsLibcoreTestCases
Change-Id: Ibfe6af6a47fe0cfffd0859ffbe58980aeb84e053
diff --git a/runtime/well_known_classes.cc b/runtime/well_known_classes.cc
index 5f5fbc8..16c7f77 100644
--- a/runtime/well_known_classes.cc
+++ b/runtime/well_known_classes.cc
@@ -48,8 +48,8 @@
 jclass WellKnownClasses::java_lang_NoClassDefFoundError;
 jclass WellKnownClasses::java_lang_Object;
 jclass WellKnownClasses::java_lang_OutOfMemoryError;
-jclass WellKnownClasses::java_lang_reflect_AbstractMethod;
 jclass WellKnownClasses::java_lang_reflect_Constructor;
+jclass WellKnownClasses::java_lang_reflect_Executable;
 jclass WellKnownClasses::java_lang_reflect_Field;
 jclass WellKnownClasses::java_lang_reflect_Method;
 jclass WellKnownClasses::java_lang_reflect_Proxy;
@@ -154,7 +154,7 @@
 jfieldID WellKnownClasses::java_lang_Throwable_stackTrace;
 jfieldID WellKnownClasses::java_lang_Throwable_stackState;
 jfieldID WellKnownClasses::java_lang_Throwable_suppressedExceptions;
-jfieldID WellKnownClasses::java_lang_reflect_AbstractMethod_artMethod;
+jfieldID WellKnownClasses::java_lang_reflect_Executable_artMethod;
 jfieldID WellKnownClasses::java_lang_reflect_Proxy_h;
 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_capacity;
 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_effectiveDirectAddress;
@@ -237,8 +237,8 @@
   java_lang_ExceptionInInitializerError = CacheClass(env, "java/lang/ExceptionInInitializerError");
   java_lang_IllegalAccessError = CacheClass(env, "java/lang/IllegalAccessError");
   java_lang_NoClassDefFoundError = CacheClass(env, "java/lang/NoClassDefFoundError");
-  java_lang_reflect_AbstractMethod = CacheClass(env, "java/lang/reflect/AbstractMethod");
   java_lang_reflect_Constructor = CacheClass(env, "java/lang/reflect/Constructor");
+  java_lang_reflect_Executable = CacheClass(env, "java/lang/reflect/Executable");
   java_lang_reflect_Field = CacheClass(env, "java/lang/reflect/Field");
   java_lang_reflect_Method = CacheClass(env, "java/lang/reflect/Method");
   java_lang_reflect_Proxy = CacheClass(env, "java/lang/reflect/Proxy");
@@ -362,7 +362,7 @@
   java_lang_Throwable_stackTrace = CacheField(env, java_lang_Throwable, false, "stackTrace", "[Ljava/lang/StackTraceElement;");
   java_lang_Throwable_stackState = CacheField(env, java_lang_Throwable, false, "backtrace", "Ljava/lang/Object;");
   java_lang_Throwable_suppressedExceptions = CacheField(env, java_lang_Throwable, false, "suppressedExceptions", "Ljava/util/List;");
-  java_lang_reflect_AbstractMethod_artMethod = CacheField(env, java_lang_reflect_AbstractMethod, false, "artMethod", "J");
+  java_lang_reflect_Executable_artMethod = CacheField(env, java_lang_reflect_Executable, false, "artMethod", "J");
   java_lang_reflect_Proxy_h = CacheField(env, java_lang_reflect_Proxy, false, "h", "Ljava/lang/reflect/InvocationHandler;");
   java_nio_DirectByteBuffer_capacity = CacheField(env, java_nio_DirectByteBuffer, false, "capacity", "I");
   java_nio_DirectByteBuffer_effectiveDirectAddress = CacheField(env, java_nio_DirectByteBuffer, false, "address", "J");