Update MTP model to "Fairphone 4 5G"

Build.MODEL is "FP4" which should not be user-visible.

Issue: FP4-1768
Issue: FP4-INT#30
Change-Id: I07f2b495d9ae8dbb24b48dc43b711dc011aec8f1
diff --git a/src/com/android/mtp/MtpService.java b/src/com/android/mtp/MtpService.java
index 8520b9e..c134878 100644
--- a/src/com/android/mtp/MtpService.java
+++ b/src/com/android/mtp/MtpService.java
@@ -203,7 +203,7 @@
             final MtpServer server =
                     new MtpServer(database, fd, mPtpMode,
                             new OnServerTerminated(), Build.MANUFACTURER,
-                            Build.MODEL, "1.0");
+                            "Fairphone 4 5G", "1.0");
             database.setServer(server);
             sServerHolder = new ServerHolder(server, database);