Hello Ashish,
I totally agree with Stephen's statement. If you have already installed SMP 3 SP10 SDK than you will get android client on below mentioned path
C:\SAP\MobileSDK3\AgentryToolkit\AgentryClients\AgentryAndroidClient
or else you can directly navigate to Play store of android device and search for SAP Work Manager. from there you can directly install Agentry client.
Latest version is 6.2.1.0.
Ajitesh