[MOB-974] Add google pay to payment methods list screen

[aw-hector]

This Pr adds first-stage support for Google Pay by:

• Sending isReadyToPay request to Google Pay API with combined information of
  1. Card schemes from pa/config/payment_method_types
  2. User config of googlePayOptions of a AirwallexSession
• Showing Google Pay payment option in the list based on
  1. If above response returns true
  2. If Google Pay module is imported in the sample/merchant app

[github-actions[bot]]

Unit Test Results

199 tests  +20   199 :heavy_check_mark: +20   1m 0s :stopwatch: +16s   91 suites +  7       0 :zzz: ±  0    91 files   +  7       0 :x: ±  0 

Results for commit 1e66509a. ± Comparison against base commit 04a0893c.

This pull request removes 1 and adds 21 tests. Note that renamed tests count towards both.

``` com.airwallex.android.core.AirwallexPluginsTest ‑ restClientTest ``` ``` com.airwallex.android.card.CardComponentProviderTest ‑ canHandleSessionAndPaymentMethod com.airwallex.android.core.AirwallexPaymentManagerTest ‑ test start RetrieveAvailablePaymentMethods operation com.airwallex.android.core.AirwallexPluginsTest ‑ test REST client com.airwallex.android.core.AirwallexPluginsTest ‑ test can't get action component provider com.airwallex.android.core.AirwallexPluginsTest ‑ test get action component provider com.airwallex.android.core.model.AvailablePaymentMethodTypeParserTest ‑ testParseResult com.airwallex.android.core.model.CardSchemeTest ‑ testParams com.airwallex.android.core.model.GooglePayOptionsTest ‑ testParams com.airwallex.android.googlepay.GooglePayComponentProviderTest ‑ test canHandleAction com.airwallex.android.googlepay.GooglePayComponentProviderTest ‑ test canHandleSessionAndPaymentMethod when Google Pay API returns exception … ```

:recycle: This comment has been updated with latest results.

[JinW-Airwallex]

Well done Hector!