Add more warning logs in Network detection (#1205)

* Add warning logs when permission or feature check fails

* Make slightly less verbose as possible

Author: surbhiia

services/src/main/java/io/opentelemetry/android/internal/services/network/CarrierFinder.java

@@ -35,13 +35,22 @@ public CarrierFinder(@NonNull Context context, @NonNull TelephonyManager telepho
     @Nullable
     public Carrier get() {
         if (!hasTelephonyFeature(context)) {
+            Log.w(
+                    RumConstants.OTEL_RUM_LOG_TAG,
+                    "Cannot determine carrier details: telephony feature missing.");
             return null;
         }
 
         try {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P
-                    && hasPhoneStatePermission(context)) {
-                return getCarrierPostApi28();
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+                if (hasPhoneStatePermission(context)) {
+                    return getCarrierPostApi28();
+                } else {
+                    Log.w(
+                            RumConstants.OTEL_RUM_LOG_TAG,
+                            "Missing read phone state permission, using legacy carrier methods.");
+                    return getCarrierPreApi28();
+                }
             } else {
                 return getCarrierPreApi28();
             }

services/src/main/java/io/opentelemetry/android/internal/services/network/detector/NetworkDetectorImpl.kt

@@ -108,6 +108,10 @@ internal class NetworkDetectorImpl(
     @Suppress("MissingPermission")
     private fun findSubtype(): String? {
         if (!(hasTelephonyFeature(context) && hasPhoneStatePermission(context))) {
+            Log.w(
+                RumConstants.OTEL_RUM_LOG_TAG,
+                "Cannot determine network subtype: missing telephony feature or read phone state permission.",
+            )
             return null
         }