Bug 1725400 - Fix GeckoView release artifactId. r=nalexander,owlish

The problem here is that the release artifactId was using single quotes instead
of double. I rewrote this code a little bit to avoid this sort of problem next
time by not having a release-build-only conditional branch.

Differential Revision: https://phabricator.services.mozilla.com/D122496

mobile/android/geckoview/build.gradle

@@ -437,13 +437,14 @@ publishing {
                         omniSuffix = "-omni"
                     }
 
-                    if (mozconfig.substs.MOZ_UPDATE_CHANNEL == 'release') {
-                        // Release artifacts don't specify the channel, for the sake of simplicity.
-                        artifactId = 'geckoview$omniSuffix'
-                    } else {
-                        artifactId = "geckoview-${mozconfig.substs.MOZ_UPDATE_CHANNEL}$omniSuffix"
+                    def channelSuffix = ""
+                    // Release artifacts don't specify the channel, for the sake of simplicity.
+                    if (mozconfig.substs.MOZ_UPDATE_CHANNEL != 'release') {
+                        channelSuffix = "-${mozconfig.substs.MOZ_UPDATE_CHANNEL}"
                     }
 
+                    artifactId = "geckoview$channelSuffix$omniSuffix"
+
                     if (mozconfig.substs.MOZILLA_OFFICIAL && !mozconfig.substs.MOZ_ANDROID_FAT_AAR_ARCHITECTURES) {
                         // In automation, per-architecture artifacts identify
                         // the architecture; multi-architecture artifacts don't.