Added builder for SubscriptionInfo

Added the builder for SubscriptionInfo, and make all members
final. This can prevent other clients accidentally modifying
the same copy of SubscriptionInfo.

Also moved getAllAccessRules into getAccessRules.

Bug: 239607619
Bug: 247140269
Test: Manual + atest SubscriptionInfoTest
Change-Id: I8eb757960375c299f7770cbed27cd0fca8e33612