Replace minzip with libziparchive

Clean up the duplicated codes that handle the zip files in
bootable/recovery; and rename the library of the remaining
utility functions to libotautil.

Test: Update package installed successfully on angler.
Bug: 19472796

Change-Id: Iea8962fcf3004473cb0322b6bb3a9ea3ca7f679e

verifier.cpp

@@ -184,7 +184,7 @@ int verify_file(unsigned char* addr, size_t length,
         if (eocd[i  ] == 0x50 && eocd[i+1] == 0x4b &&
             eocd[i+2] == 0x05 && eocd[i+3] == 0x06) {
             // if the sequence $50 $4b $05 $06 appears anywhere after
-            // the real one, minzip will find the later (wrong) one,
+            // the real one, libziparchive will find the later (wrong) one,
             // which could be exploitable.  Fail verification if
             // this sequence occurs anywhere after the real one.
             LOG(ERROR) << "EOCD marker occurs after start of EOCD";