feat: update minsdk version to 23 similar to CloudDev SDK

Author: shashanksu

Adjust/build.gradle

@@ -14,7 +14,7 @@ ext {
     webbridgeMinSdkVersion = 17
     samsungReferrerMinSdkVersion = 18
     vivoReferrerMinSdkVersion = 23
-    samsungCloudDevMinSdkVersion = 24
+    samsungCloudDevMinSdkVersion = 23
 
     // POM.
     adjustGroupId = 'com.adjust.sdk'

Adjust/sdk-plugin-samsung-clouddev/src/main/java/com/adjust/sdk/samsung/clouddev/SamsungCloudDevClient.java

@@ -22,7 +22,10 @@ public static String getGoogleAdId(Context context, final ILogger logger, long m
             CloudDevSdk.INSTANCE.request(context, Arrays.asList("gaid"), new CloudDevCallback() {
                 @Override
                 public void onSuccess(Map<String, String> kinds) { // This is called in IO thread
-                    String gaid = kinds.getOrDefault("gaid", "");
+                    String gaid = kinds.get("gaid");
+                    if (gaid == null) {
+                        gaid = "";
+                    }
                     logger.info("Google Advertising ID: " + gaid);
                     gaidHolder.offer(gaid);
                 }