wx.chooseImage与wx.getFileSystemManager

• 当前 Bug 的表现（可附上截图）

通过chooseImage，调用相机拍照后，通过getFileSystemManager.readFile读取之前拍摄的图片base64数据，图片会保存在用户本地

• 预期表现

图片不保存到用户本地

• 复现路径

uploadImg: function(flg) {         var that = this         that.loadingShow()         wx.chooseImage({             count: 1,              sizeType: ['compressed'],             sourceType: ['camera'],              success: function(res) {                 // let path = res.tempFilePaths                 wx.saveFile({                     tempFilePath: res.tempFilePaths[0],                     success: function (res) {                         let path = res.savedFilePath                         wx.getFileSystemManager().readFile({                             filePath: path,                              encoding: 'base64',                              success: res => {                                                                          console.log(res)                             }                         })                     }                 })                               },             fail: function(res) {                 console.log('接口异常');                 that.connectErrorReturn('操作取消或者相机打开异常');                 return;             }         })     },

• 提供一个最简复现 Demo