Android 默认科大讯飞语音包 即 默认文字转语音TTS包
一：设置默认科大讯飞TTs为默认选项
/vendor/mediatek/proprietary/packages/apps//SettingsProvider/res/values/defaults.xml中增加
+++ <string name="default_tts" translatable="false">com.iflytek.speechcloud</string>
</resources>
/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings$
private void loadSecureSettings(SQLiteDatabase db) {
loadStringSetting(stmt,Settings.Secure.TTS_DEFAULT_SYNTH,R.string.default_tts);
二、允许安装未知来源的应用程序都设置为默认选项
/vendor/mediatek/proprietary/packages/apps/SettingsProvider/res/values/default.xml
--- <bool name="def_install_non_market_apps">false</bool>
+++ <bool name="def_install_non_market_apps">true</bool>