Revert #13526 and #13640 (#13684)

Revert #13526 and #13640 to land as one internally

Author: jackzhxng

extension/android/BUCK

@@ -10,7 +10,6 @@ non_fbcode_target(_kind = fb_android_library,
         "executorch_android/src/main/java/org/pytorch/executorch/DType.java",
         "executorch_android/src/main/java/org/pytorch/executorch/EValue.java",
         "executorch_android/src/main/java/org/pytorch/executorch/ExecuTorchRuntime.java",
-        "executorch_android/src/main/java/org/pytorch/executorch/ExecutorchRuntimeException.java",
         "executorch_android/src/main/java/org/pytorch/executorch/MethodMetadata.java",
         "executorch_android/src/main/java/org/pytorch/executorch/Module.java",
         "executorch_android/src/main/java/org/pytorch/executorch/Tensor.java",

extension/android/CMakeLists.txt

@@ -71,7 +71,6 @@ executorch_target_link_options_shared_lib(executorch)
 
 add_library(
   executorch_jni SHARED jni/jni_layer.cpp jni/log.cpp jni/jni_layer_runtime.cpp
-                        jni/jni_helper.cpp
 )
 
 set(link_libraries)

extension/android/executorch_android/src/main/java/org/pytorch/executorch/ExecutorchRuntimeException.java

@@ -28,7 +28,7 @@ non_fbcode_target(_kind = executorch_generated_lib,
 
 non_fbcode_target(_kind = fb_android_cxx_library,
     name = "executorch_jni",
-    srcs = ["jni_layer.cpp", "log.cpp", "jni_layer_runtime.cpp", "jni_helper.cpp"],
+    srcs = ["jni_layer.cpp", "log.cpp", "jni_layer_runtime.cpp"],
     allow_jni_merging = False,
     compiler_flags = ET_JNI_COMPILER_FLAGS,
     soname = "libexecutorch.$(ext)",
@@ -49,7 +49,7 @@ non_fbcode_target(_kind = fb_android_cxx_library,
 
 non_fbcode_target(_kind = fb_android_cxx_library,
     name = "executorch_jni_full",
-    srcs = ["jni_layer.cpp", "log.cpp", "jni_layer_runtime.cpp", "jni_helper.cpp"],
+    srcs = ["jni_layer.cpp", "log.cpp", "jni_layer_runtime.cpp"],
     allow_jni_merging = False,
     compiler_flags = ET_JNI_COMPILER_FLAGS,
     soname = "libexecutorch.$(ext)",
@@ -71,7 +71,7 @@ non_fbcode_target(_kind = fb_android_cxx_library,
 
 non_fbcode_target(_kind = fb_android_cxx_library,
     name = "executorch_training_jni",
-    srcs = ["jni_layer.cpp", "log.cpp", "jni_layer_runtime.cpp", "jni_layer_training.cpp", "jni_helper.cpp"],
+    srcs = ["jni_layer.cpp", "log.cpp", "jni_layer_runtime.cpp", "jni_layer_training.cpp"],
     allow_jni_merging = False,
     compiler_flags = ET_JNI_COMPILER_FLAGS + [
         "-DEXECUTORCH_BUILD_EXTENSION_TRAINING",
@@ -102,7 +102,6 @@ non_fbcode_target(_kind = fb_android_cxx_library,
         "jni_layer.cpp",
         "jni_layer_llama.cpp",
         "jni_layer_runtime.cpp",
-        "jni_helper.cpp",
     ],
     allow_jni_merging = False,
     compiler_flags = ET_JNI_COMPILER_FLAGS + [
@@ -146,14 +145,9 @@ runtime.export_file(
     name = "jni_layer_runtime.cpp",
 )
 
-runtime.export_file(
-    name = "jni_helper.cpp",
-)
-
 runtime.cxx_library(
     name = "jni_headers",
     exported_headers = [
         "jni_layer_constants.h",
-        "jni_helper.h",
     ]
 )