test(mayachain): use the real Maya ETH Router v4 in eth swap/liquidity tests

Firmware MAYA_ROUTER was corrected from the dead d89dce57.. to the
Etherscan-verified v4 e3985e6b..46d, so these ETH swaps must target the
real router to be clear-signed (else they fall to the AdvancedMode
blind-sign gate). Assertions are structural; no exact-vector regen needed.

Author: BitHighlander

tests/test_msg_mayachain_signtx.py

@@ -78,7 +78,7 @@ def test_sign_eth_btc_swap(self):
             gas_price=0x5FB9ACA00,
             gas_limit=0x186A0,
             value=0x00,
-            to=unhexlify('d89dce570de35a6f42d3bca7dba50a6d89bfc2a2'),  # Maya router (firmware-pinned)
+            to=unhexlify('e3985e6b61b814f7cdb188766562ba71b446b46d'),  # Maya router v4 (firmware-pinned)
             address_type=0,
             chain_id=1,
             data=unhexlify('1fece7b4' +
@@ -128,7 +128,7 @@ def test_sign_eth_add_liquidity(self):
             gas_price=0x5FB9ACA00,
             gas_limit=0x186A0,
             value=0x00,
-            to=unhexlify('d89dce570de35a6f42d3bca7dba50a6d89bfc2a2'),  # Maya router (firmware-pinned)
+            to=unhexlify('e3985e6b61b814f7cdb188766562ba71b446b46d'),  # Maya router v4 (firmware-pinned)
             address_type=0,
             chain_id=1,
             data=unhexlify('1fece7b4' +