[experimental/pedometer] Use jnigen and jni version from pub instead of git url. (#1655)

experimental/pedometer/android/.gitignore

@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx

experimental/pedometer/android/build.gradle

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+// The Android Gradle Plugin builds the native code with the Android NDK.
+
+group 'dev.flutter.pedometer'
+version '1.0'
+
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        // The Android Gradle Plugin knows how to build native code with the NDK.
+        classpath 'com.android.tools.build:gradle:7.2.0'
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+
+android {
+    // Bumping the plugin compileSdkVersion requires all clients of this plugin
+    // to bump the version in their app.
+    compileSdkVersion 31
+
+    // Bumping the plugin ndkVersion requires all clients of this plugin to bump
+    // the version in their app and to download a newer version of the NDK.
+    ndkVersion "21.4.7075529"
+
+    // Invoke the shared CMake build with the Android Gradle Plugin.
+    externalNativeBuild {
+        cmake {
+            path "../src/health_connect/CMakeLists.txt"
+
+            // The default CMake version for the Android Gradle Plugin is 3.10.2.
+            // https://developer.android.com/studio/projects/install-ndk#vanilla_cmake
+            //
+            // 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.
+            // version "3.10.2"
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        minSdkVersion 16
+    }
+}

experimental/pedometer/android/settings.gradle

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+rootProject.name = 'pedometer'

experimental/pedometer/android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="dev.flutter.pedometer">
+</manifest>