downgrade Android SDK to use old permission mode because on demand request require Java code

android/build.gradle

@@ -3,19 +3,20 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.0'
+        classpath 'com.android.tools.build:gradle:2.3.1'
+        compile 'it.sephiroth.android.exif:library:1.0.1'
     }
 }
 apply plugin: 'android'
 
 android {
-    compileSdkVersion 23
+    compileSdkVersion 19
     buildToolsVersion '23.0.2'
 
     defaultConfig {
         applicationId = 'com.omigamedev'
         minSdkVersion   9
-        targetSdkVersion  23
+        targetSdkVersion  19
         // This block is different from the one you use to link Gradle
         // to your CMake or ndk-build script.
         externalNativeBuild {