主页tab未选中文字颜色统一,新增输入框提示文字颜色规范

nim_uikit/res/layout/nim_message_activity_text_layout.xml

@@ -69,7 +69,7 @@
         android:imeOptions="actionSend"
         android:inputType="text"
         android:hint="@string/message_hint"
-        android:textColorHint="#555574"
+        android:textColorHint="@color/text_hint_555574"
         android:paddingStart="@dimen/dp_10"
         android:paddingEnd="10dp"
         android:background="@drawable/bg_message_input"