[QS] Update hotspot tile secondary text (data saver)

Updating the secondary text to show a different message when data saver
is enabled (to explain to the user why they can't toggle the tile).

Also collapsed double ternary to make it a bit easier to read.

Test: Visually
Bug: 33003328
Change-Id: I8a98f95c60ec9dcbe5899e87e29759e8d377b106
diff --git a/packages/SystemUI/src/com/android/systemui/qs/tiles/HotspotTile.java b/packages/SystemUI/src/com/android/systemui/qs/tiles/HotspotTile.java
index 81e3d5ad..00d6bd0 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/tiles/HotspotTile.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/tiles/HotspotTile.java
@@ -137,7 +137,6 @@
 
         state.icon = mEnabledStatic;
         state.label = mContext.getString(R.string.quick_settings_hotspot_label);
-        state.secondaryLabel = getSecondaryLabel(state.value, isTransient, numConnectedDevices);
         state.isAirplaneMode = mAirplaneMode.getValue() != 0;
         state.isTransient = isTransient;
         state.slash.isSlashed = !state.value && !state.isTransient;
@@ -149,19 +148,26 @@
 
         final boolean isTileUnavailable = (state.isAirplaneMode || isDataSaverEnabled);
         final boolean isTileActive = (state.value || state.isTransient);
-        state.state = isTileUnavailable
-                ? Tile.STATE_UNAVAILABLE
-                : isTileActive
-                        ? Tile.STATE_ACTIVE
-                        : Tile.STATE_INACTIVE;
+
+        if (isTileUnavailable) {
+            state.state = Tile.STATE_UNAVAILABLE;
+        } else {
+            state.state = isTileActive ? Tile.STATE_ACTIVE : Tile.STATE_INACTIVE;
+        }
+
+        state.secondaryLabel = getSecondaryLabel(
+                isTileActive, isTransient, isDataSaverEnabled, numConnectedDevices);
     }
 
     @Nullable
-    private String getSecondaryLabel(
-            boolean enabled, boolean isTransient, int numConnectedDevices) {
+    private String getSecondaryLabel(boolean isActive, boolean isTransient,
+            boolean isDataSaverEnabled, int numConnectedDevices) {
         if (isTransient) {
             return mContext.getString(R.string.quick_settings_hotspot_secondary_label_transient);
-        } else if (numConnectedDevices > 0 && enabled) {
+        } else if (isDataSaverEnabled) {
+            return mContext.getString(
+                    R.string.quick_settings_hotspot_secondary_label_data_saver_enabled);
+        } else if (numConnectedDevices > 0 && isActive) {
             return mContext.getResources().getQuantityString(
                     R.plurals.quick_settings_hotspot_secondary_label_num_devices,
                     numConnectedDevices,