chore: remove Branch.io SDK and route deep links through own domain

Branch.io was inherited from Nova Wallet fork but never configured.
Removed SDK integration, manifest intent filters, Gradle dependencies,
Dagger DI modules, and string resources. Deep linking now routes
exclusively through app.pezkuwichain.io with verified assetlinks.json.

common/src/main/res/values-ku/strings.xml

@@ -302,8 +302,6 @@
     <string name="account_migration_accepted_url" translatable="false">%s://polkadot/migration-accepted?key=%s</string>
     <string name="account_ledger_import_start_step_3_highlighted">access Bluetooth</string>
 
-    <string name="branch_io_link_host" translatable="false">pezkuwi-wallet.app.link</string>
-    <string name="branch_io_link_host_alternate" translatable="false">pezkuwi-wallet-alternate.app.link</string>
 
     <string name="ledger_verify_addresses_message_both_buttons">Press both buttons on yê te %s to approve  addresses</string>
     <string name="ledger_verify_addresses_message_confirm_button">Press confirm button on yê te %s to approve  addresses</string>

common/src/main/res/values/strings.xml

@@ -2759,8 +2759,6 @@
     <string name="wallet_send_phishing_warning_title">Scam alert</string>
     <string name="wallet_transfer_details_title">Transfer details</string>
     <string name="yesterday">Yesterday</string>
-    <string name="branch_io_link_host" translatable="false">pezkuwi-wallet.app.link</string>
-    <string name="branch_io_link_host_alternate" translatable="false">pezkuwi-wallet-alternate.app.link</string>
 
     <string name="pezkuwi_dashboard_title">Pezkuwi</string>
     <string name="pezkuwi_dashboard_trust_score">Trust Score</string>