备忘一下sharedUserid，同签名，processname互通数据等

T268

The steps are
1. Make sure each application, when packaged for release, is signed with the same keyfor security reasons.
2. Make sure each application is run with the same user ID.This is done by declaringthe same attribute android:sharedUserId="my.shared.userid"  in theActivityManifest.xml for each application.
3. Declare each relevant activity or component to be run in the same process.This isdone by declaring the same attribute android:process="my.shared.processname"  in the ActivityManifest.xml for each component.