Email: Fix Email ClassCastException in monkey test

It's a fault to cast base class array(Parcelable[]) to
derived class array(Conversation[]), there is no inheritance
relationship between these two array types.
So cast every element of the Parcelable array to Conversation
type separately to avoid this exception.

Change-Id: I17f06b439853604ef5d4f25ee708d0896e03b69a
CRs-Fixed: 2248737
Issue: FP2P-518
(cherry picked from commit 23ae37b57d3a19f7e569363fbb7f57a6ec866cf6)
1 file changed