Mobile (#735)

Initial modification to support mobile client

Export necessary interfaces for Android framework

client/internal/peer/notifier_test.go

@@ -0,0 +1,32 @@
+package peer
+
+import (
+	"testing"
+)
+
+func Test_notifier_serverState(t *testing.T) {
+
+	type scenario struct {
+		name        string
+		expected    bool
+		mgmState    bool
+		signalState bool
+	}
+	scenarios := []scenario{
+		{"connected", true, true, true},
+		{"mgm down", false, false, true},
+		{"signal down", false, true, false},
+		{"disconnected", false, false, false},
+	}
+
+	for _, tt := range scenarios {
+		t.Run(tt.name, func(t *testing.T) {
+			n := newNotifier()
+			n.updateServerStates(tt.mgmState, tt.signalState)
+			if n.currentServerState != tt.expected {
+				t.Errorf("invalid serverstate: %t, expected: %t", n.currentServerState, tt.expected)
+			}
+
+		})
+	}
+}