refactor: native FFI for Android and Cocoa SDK

flutter/android/build.gradle

@@ -57,6 +57,12 @@ android {
         jvmTarget = JavaVersion.VERSION_1_8
         languageVersion = "1.4"
     }
+
+    externalNativeBuild {
+        cmake {
+            path "src/main/cpp/CMakeLists.txt"
+        }
+    }
 }
 
 dependencies {

flutter/android/src/main/cpp/.clang-format

@@ -0,0 +1,15 @@
+# From dart SDK: https://github.com/dart-lang/sdk/blob/main/.clang-format
+
+# Defines the Chromium style for automatic reformatting.
+# http://clang.llvm.org/docs/ClangFormatStyleOptions.html
+BasedOnStyle: Chromium
+
+# clang-format doesn't seem to do a good job of this for longer comments.
+ReflowComments: 'false'
+
+# We have lots of these. Though we need to put them all in curly braces,
+# clang-format can't do that.
+AllowShortIfStatementsOnASingleLine: 'true'
+
+# Put escaped newlines into the rightmost column.
+AlignEscapedNewlinesLeft: false

flutter/android/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,32 @@
+# jni_native_build (Build with jni:setup. Do not delete this line.)
+
+# The Flutter tooling requires that developers have CMake 3.10 or later
+# installed. You should not increase this version, as doing so will cause
+# the plugin to fail to compile for some customers of the plugin.
+cmake_minimum_required(VERSION 3.10)
+
+project(sentry_android_binding VERSION 0.0.1 LANGUAGES C)
+
+add_library(sentry_android_binding SHARED
+  "./sentry_android_binding.c"
+)
+
+set_target_properties(sentry_android_binding PROPERTIES
+  OUTPUT_NAME "sentry_android_binding"
+)
+
+target_compile_definitions(sentry_android_binding PUBLIC DART_SHARED_LIB)
+
+if(WIN32)
+	set_target_properties(${TARGET_NAME} PROPERTIES
+		LINK_FLAGS "/DELAYLOAD:jvm.dll")
+endif()
+
+if (ANDROID)
+	target_link_libraries(sentry_android_binding log)
+else()
+	find_package(Java REQUIRED)
+	find_package(JNI REQUIRED)
+	include_directories(${JNI_INCLUDE_DIRS})
+	target_link_libraries(sentry_android_binding ${JNI_LIBRARIES})
+endif()