Capture/report the Sdk Extension version

### Problem Statement

Right now the sdk captures the OS version, but not the Sdk extensions version.

### Solution Brainstorm

call `SdkExtensions.getExtensionVersion` and add it to events and transactions.
https://developer.android.com/guide/sdk-extensions#checks

Extensions would need to be a map.
"R" -> 4
"S" -> 1
"T" -> 0