Delay PACKAGE_RESTARTED until after data cleared.

Some system internals are using the PACKAGE_RESTARTED broadcast to
rebind to services, which would fail if the package was still frozen
due to a long-running clear data operation.  To avoid this, delay both
the PACKAGE_RESTARTED and PACKAGE_DATA_CLEARED broadcasts until after
the clear operation has finished.

Bug: 28964281
Change-Id: I18ac36c39ba90498b1eb0cc495da1f16c24614bf