NavigationModeSwitchRule: log exception before 'finally'

Change-Id: I158105da467e2759fec6fa5d8acd582b2e95f7c5
diff --git a/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java b/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java
index b6cd1be..28a9707 100644
--- a/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java
+++ b/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java
@@ -102,6 +102,9 @@
                         if (mode == THREE_BUTTON || mode == ALL) {
                             evaluateWithThreeButtons();
                         }
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception", e);
+                        throw e;
                     } finally {
                         setActiveOverlay(prevOverlayPkg, originalMode);
                     }