Revert "fix NAT detection in SipService"

This reverts commit 01152caeb33c930649bb76bdc5b5e760bbdc542e.
Revert "fix NoSuchElementException error with CPU ProcessStats"

This reverts commit 45c40f0db43ef227916afba8ed72c226f19bff6c.
Revert "PackageInfo class incorrectly referenced as a struct."

This reverts commit 8e4025d050a1e3d26d4bbdca5a39f1b6031065a8.
Revert "add Settings.System boolean helper methods"

This reverts commit 3cafa0c5fc4f48f18a4ffee97ddd7c9d02210342.
Revert "Avoid possible memory leaks by ensuring stream closures"

This reverts commit 4af2ce47f297ec9ea27bb57d4b326fbab0daeae7.
Revert "Optimize drawHardwareAccelerated method in Editor class"

This reverts commit 03881be21b6ab92ed03ea607eab72b9f5d91b170.
Revert "ProcessStats: Fix another crasher"

This reverts commit 867b900f68663100c1fbe56385197906377f07b7.
Revert "ActivityManagerService: stay away from zombie content providers"

This reverts commit dc44dfda3e76ee457de11b5f4a584ae818f0dda3.