getAppInfo
Returns the version name of the application as defined in the manifest.
Uses android.content.pm.PackageManager.getPackageInfo to retrieve package metadata. Falls back to an empty string if android.content.pm.PackageInfo.versionName is null.
Return
A String representing the version name (e.g., "1.0.0"), or an empty string if unavailable.
Parameters
context
The Context used to access the package manager.