Bug 515519

SUMMARY
After launching the digitzer activity the application crashes.

STEPS TO REPRODUCE
1. Launch the Digitizer/Drawing tablet activity (With something like App manager)

OBSERVED RESULT
Crash

EXPECTED RESULT
Opening the digitizer and being able to draw/sign in docs

SOFTWARE/OS VERSIONS
Android OS: 16 QPR2
KDE Connect (Android): 1.35.1

ADDITIONAL INFORMATION
Logs from the crash:

```
type: crash
osVersion: google/tokay/tokay:16/BP4A.260105.004.E1/2026012800:user/release-keys
flags: dev options enabled
package: org.kde.kdeconnect_tp:13501, targetSdk 35
process: org.kde.kdeconnect_tp
processUptime: 133 + 359 ms
installer: com.machiav3lli.fdroid

java.lang.RuntimeException: Unable to start activity ComponentInfo{org.kde.kdeconnect_tp/org.kde.kdeconnect.plugins.digitizer.DigitizerActivity}
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4514)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4717)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:224)
	at android.app.servertransaction.TransactionExecutor.executeNonLifecycleItem(TransactionExecutor.java:133)
	at android.app.servertransaction.TransactionExecutor.executeTransactionItems(TransactionExecutor.java:103)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:80)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2970)
	at android.os.Handler.dispatchMessage(Handler.java:132)
	at android.os.Looper.dispatchMessage(Looper.java:333)
	at android.os.Looper.loopOnce(Looper.java:263)
	at android.os.Looper.loop(Looper.java:367)
	at android.app.ActivityThread.main(ActivityThread.java:9331)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:566)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:837)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
	at org.kde.kdeconnect.plugins.digitizer.DigitizerActivity.onCreate(r8-map-id-1677b72d8268eb94ffb4fdf95a1dec9feb753fb258a1fa1a4bbc93b393b6fd7d:14)
	at android.app.Activity.performCreate(Activity.java:9359)
	at android.app.Activity.performCreate(Activity.java:9337)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1551)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4498)
	... 14 more
```