feat(android): bump Android SDK to 1.8.0 to enable Google Pay

Author: anthony

flutter_lyra_android/android/build.gradle

@@ -48,5 +48,5 @@ android {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 
-    implementation 'com.lyra:sdk:1.6.9'
-}
+    implementation 'com.lyra:sdk:1.8.0'
+}