Fix duplicate permission privilege escalation

Duplicate permissions definition with different group allows
privilege permission escalation to a different permission group.

Android studio and gradle plugin does not allow duplicate
permissions with different attributes, these tools only allow
if duplicate permissions are exact copies.

Also platform stores permissions in map at multiple places with
permission name as key. This suggests that we can disallow
duplicate permissions during package install/update.

Bug: 213323615
Test: manual
Change-Id: I6f44e740897305e7a0553c1cf6c3af37faf02a2e
Merged-In: I1910dca44104e35a57eba4acfa8188cd9b8626ac
Merged-In: I34120fff2ec2a158dfa55779d2afd4bbd49487ff
Merged-In: I9bc839836786a0876e67fd73c05f8944bb532249