refactor(appbase): SMTPConfigView改用libaes内置版本并修复R8混淆崩溃

- APPExcetionMailSettingsActivity引用改为cc.winboll.studio.libaes.views.SMTPConfigView
- 删除libappbase自定义SMTPConfigView
- appbase添加JavaMail依赖(android-mail/android-activation 1.6.7)
- proguard-rules保留javax.mail.**修复NoClassDefFoundError
- packagingOptions排除重复META-INF文件

appbase/proguard-rules.pro

@@ -73,6 +73,10 @@
 -dontwarn java.util.function.**
 
 # ============================== 第三方框架规则 ==============================
+# JavaMail（libaes SMTPConfigView依赖）
+-keep class javax.mail.** { *; }
+-dontwarn javax.mail.**
+
 # Retrofit + OkHttp
 -keep class retrofit2.** { *; }
 -keep interface retrofit2.** { *; }