feat: client identification headers (#103)

Author: kwasniew

unleashandroidsdk/build.gradle.kts

@@ -22,6 +22,10 @@ android {
     namespace = "io.getunleash.android"
     compileSdk = 34
 
+    buildFeatures {
+        buildConfig = true
+    }
+
     defaultConfig {
         minSdk = 21
 
@@ -30,6 +34,8 @@ android {
         }
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles("proguard-rules.pro")
+
+        buildConfigField("String", "VERSION", "\"${project.version}\"")
     }
 
     buildTypes {

unleashandroidsdk/src/main/java/io/getunleash/android/UnleashConfig.kt

@@ -44,8 +44,11 @@ data class UnleashConfig(
             "Authorization" to auth,
             "Content-Type" to "application/json",
             "UNLEASH-APPNAME" to appName,
+            "X-UNLEASH-APPNAME" to appName,
             "User-Agent" to appName,
             "UNLEASH-INSTANCEID" to instanceId,
+            "X-UNLEASH-CONNECTION-ID" to instanceId,
+            "X-UNLEASH-SDK" to "unleash-client-android:" + BuildConfig.VERSION,
         ))
     }