Older versions of the browsers included in Android OS do not support TLS 1.1. This is an industry standard encryption standard used by many applications, including Salesforce. As of June 26, 2016, Salesforce requires web browsers to support TLS 1.1 or TLS 1.2. According to the Salesforce TLS 1.0 discontinuation note, Android 4.4.4 may not be compatible. We can confirm that 4.4.2 is not compatible. It is recommended to be on Android 5.x for TLS 1.1 or greater support.