Improve the importer to detect possible issues when merging contract

[gre]

this will detect this at the moment

found two different abi for same contract! 0x11111112542d85b3ef69ae05771c2dccff4faa26
found two different abi for same contract! 0xdef171fe48cf0115b1d80b88dc8eab59176fee57
found two different abi for same contract! 0x1bd435f3c054b6e901b7b108a0ab7617c808677b

cc @YBadiss

same contract address are expected to have same abi populated as well as selector. otherwise they would be of diff address 🤔

[codecov]

Codecov Report

Merging #732 (23d02d5) into master (7bfa1d5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #732   +/-   ##
=======================================
  Coverage   45.22%   45.22%           
=======================================
  Files          82       82           
  Lines        4957     4957           
  Branches      795      815   +20     
=======================================
  Hits         2242     2242           
+ Misses       2701     2698    -3     
- Partials       14       17    +3     

Impacted Files	Coverage Δ
packages/hw-transport-http/src/HttpTransport.ts	0.00% <0.00%> (ø)
...ckages/hw-transport-http/src/WebSocketTransport.ts	0.00% <0.00%> (ø)
...s/react-native-hw-transport-ble/src/awaitsBleOn.ts	0.00% <0.00%> (ø)

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