[WLAN] APP层配置config.SSID 错误导致无法连接

先看log：

通过以下log可以知道验证SSID的名称attwifi - Passpoint发现是无效的（这段关键log　E WifiConfigurationUtil: validateSsid failed: malformed string: attwifi - Passpoint）

07-10 10:16:33.420  1345  2807 E WifiConfigManager: Cannot find network with networkId -1 or configKey attwifi - PasspointWPA_PSK or upgradable security type check
07-10 10:16:33.420   568   568 E lowmemorykiller: Invalid PROCPRIO oomadj argument -10000
07-10 10:16:33.420  1345  2807 E WifiConfigManager: Cannot find network with networkId -1 or configKey attwifi - PasspointWPA_PSK or upgradable security type check
07-10 10:16:33.421  1345  2807 E WifiConfigurationUtil: validateSsid failed: malformed string: attwifi - Passpoint
07-10 10:16:33.422  1345  2807 E WifiConfigManager: Cannot add network with invalid config
07-10 10:16:33.422  1345  2807 E WifiConfigManager: Failed to add/update network attwifi - Passpoint
07-10 10:16:33.423   568   568 E lowmemorykiller: Invalid PROCPRIO