Fix for when there are 0 accessibility services

* Check if accessibility permission is enabled

mvt/android/artifacts/dumpsys_accessibility.py

@@ -56,7 +56,7 @@ class DumpsysAccessibilityArtifact(AndroidArtifact):
 
         for line in content.splitlines():
             if line.strip().startswith("Enabled services:"):
-                matches = re.finditer(r"{([^{]*?)}", line)
+                matches = re.finditer(r"{([^{]+?)}", line)
 
                 for match in matches:
                     # Each match is in format: <package_name>/<service>

tests/artifacts/android_data/dumpsys_accessibility_v14_or_later.txt

@@ -26,7 +26,7 @@ User state[
           Client list killed: false
           Client list broadcasts count: -1
           Registered clients:{
-[com.accesibilityservice][com.android.launcher3][com.android.systemui][com.android.launcher3][com.android.settings.intelligence][com.android.inputmethod.latin]}]
+[com.malware.accessibility][com.android.launcher3][com.android.systemui][com.android.launcher3][com.android.settings.intelligence][com.android.inputmethod.latin]}]
 
 Window attributes:[{1=AccessibilityWindowAttributes{mAccessibilityWindowTitle=nullmLocales=[en_US]}, 2=AccessibilityWindowAttributes{mAccessibilityWindowTitle=nullmLocales=[en_US]}, 3=AccessibilityWindowAttributes{mAccessibilityWindowTitle=nullmLocales=[en_US]}, 4=AccessibilityWindowAttributes{mAccessibilityWindowTitle=nullmLocales=[en_US]}, 5=AccessibilityWindowAttributes{mAccessibilityWindowTitle=nullmLocales=[en_US]}, 6=AccessibilityWindowAttributes{mAccessibilityWindowTitle=nullmLocales=[en_US]}, 7=AccessibilityWindowAttributes{mAccessibilityWindowTitle=HomemLocales=[en_US]}, 9=AccessibilityWindowAttributes{mAccessibilityWindowTitle=SettingsmLocales=[en_US]}, 10=AccessibilityWindowAttributes{mAccessibilityWindowTitle=Settings SuggestionsmLocales=[en_US]}}]
 A11yInputFilter Info :