Created Session models

app/src/main/java/io/elixxir/dapp/session/models/SessionModels.kt

+package io.elixxir.dapp.session.models
+
+import bindings.Cmix
+import bindings.E2e
+
+@JvmInline
+value class SessionPassword(val value: ByteArray)
+
+@JvmInline
+value class CmixMediator(private val value: Cmix)
+
+@JvmInline
+value class E2eMediator(private val value: E2e)
+
+@JvmInline
+value class ReceptionIdentity(val value: ByteArray)
+
+@JvmInline
+value class E2eParams(val value: ByteArray)
+
+enum class Environment {
+    MainNet, ReleaseNet
+}
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