feat: polish native root tab memory

android/app/src/test/java/com/hyzq/boss/RootTabMemoryTest.java

@@ -0,0 +1,27 @@
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class RootTabMemoryTest {
+    @Test
+    public void resolveInitialTab_prefersExplicitTab() {
+        assertEquals("devices", RootTabMemory.resolveInitialTab("devices", "me", "conversations"));
+    }
+
+    @Test
+    public void resolveInitialTab_fallsBackToStoredTab() {
+        assertEquals("me", RootTabMemory.resolveInitialTab(null, "me", "devices"));
+    }
+
+    @Test
+    public void resolveInitialTab_usesPreferredEntryBeforeDefault() {
+        assertEquals("devices", RootTabMemory.resolveInitialTab(null, null, "devices"));
+    }
+
+    @Test
+    public void resolveInitialTab_defaultsToConversations() {
+        assertEquals("conversations", RootTabMemory.resolveInitialTab(null, null, null));
+    }
+}