fix: app crashes upon startup

Author: Bnyro

.gitignore

@@ -14,3 +14,4 @@
 .externalNativeBuild
 .cxx
 local.properties
+/app/release

app/proguard-rules.pro

@@ -33,4 +33,7 @@
 -keep class * extends com.google.protobuf.GeneratedMessageLite { *; }
 
 # Public transport enabler
--keep class de.schildbach.pte.**
+-keep class de.schildbach.pte.**
+
+# Data models for transport logic
+-keep class net.youapps.transport.data.transport.model.** { *; }