Fix lint job

 - Before the migration to `git-crypt`, `WooCommerce/google-services.json` file did _not_ exist at all as we didn't run `configure_apply`. In which case the gradle task would take care of copying the `google-services.json-example` file in its place
 - Now that we migrated to `git-crypt`, the `WooCommerce/google-services.json` file _always_ exists in the repo, albeit encrypted if the repo was not git-crypt-unlocked after being cloned. So the logic had to be adjusted to copy the `google-services.json-example` file if the `google-services.json` file (which always exists now) is unreadable (aka encrypted)

Author: AliSoftware

WooCommerce/build.gradle

@@ -496,12 +496,13 @@ android.buildTypes.all { buildType ->
     }
 
     // If Google services file doesn't exist, copy example file.
-    if (!file("google-services.json").exists()) {
+    def googleServicesFile = file("google-services.json")
+    if (!googleServicesFile.exists() || !canReadPropertiesFile(googleServicesFile)) {
         tasks.copyGoogleServicesExampleFile.copy()
     }
 
     // Print warning message if example Google services file is used.
-    if ((file("google-services.json").text) == (file("google-services.json-example").text)) {
+    if ((googleServicesFile.text) == (file("google-services.json-example").text)) {
         println("WARNING: You're using the example google-services.json file. Google login will fail.")
     }
 }
@@ -514,6 +515,16 @@ static def loadPropertiesFromFile(inputFile) {
     return properties
 }
 
+static def canReadPropertiesFile(File file) {
+    try {
+        loadPropertiesFromFile(file)
+        return true
+    } catch (Exception e) {
+        // Especially when the file is encrypted (git-crypt locked), the file will be unreadable.
+        return false
+    }
+}
+
 def isLeakCanaryEnabled() {
     return developerProperties.get("enable_leak_canary") ?: true
 }