fix(deps): update dependency org.mnode.ical4j:ical4j to v4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -41,7 +41,7 @@ flexboxVersion = "3.0.0"
 fragmentKtxVersion = "1.8.9"
 glide = "5.0.5"
 gsonVersion = "2.13.2"
-ical4jVersion = "3.2.19"
+ical4jVersion = "4.2.1"
 jackrabbitWebdavVersion = "2.13.5"
 jacoco = "0.8.14"
 jsonVersion = "20250517"

gradle/verification-metadata.xml

@@ -17,6 +17,9 @@
          <trust file=".*-javadoc[.]jar" regex="true" reason="Android Studio downloads javadoc jars but doesn't add checksums - fixes building in AS"/>
          <trust file=".*-sources[.]jar" regex="true" reason="Android Studio downloads source jars but doesn't add checksums - fixes building in AS"/>
       </trusted-artifacts>
+      <ignored-keys>
+         <ignored-key id="16968D251E760606" reason="Key couldn't be downloaded from any key server"/>
+      </ignored-keys>
       <trusted-keys>
          <trusted-key id="015479E1055341431B4545AB72475FD306B9CAB7" group="com.googlecode.javaewah" name="JavaEWAH" version="1.2.3"/>
          <trusted-key id="03C123038C20AAE9E286C857479D601F3A7B5C1A" group="^com[.]github[.]ajalt($|([.].*))" regex="true"/>
@@ -388,6 +391,7 @@
             <trusting group="com.mebigfatguy.fb-contrib" name="fb-contrib" version="7.6.4"/>
          </trusted-key>
          <trusted-key id="B17136D06153558101DB7DF723778689FBFBE047" group="pl.droidsonroids.gif" name="android-gif-drawable" version="1.2.29"/>
+         <trusted-key id="B41089A2DA79B0FA5810252872385FF0AF338D52" group="org.threeten" name="threeten-extra" version="1.8.0"/>
          <trusted-key id="B69A63A5EF7183DBC09199AC26E74B6874AEE127" group="com.github.bumptech.glide" name="glide" version="3.8.0"/>
          <trusted-key id="B6E73D84EA4FCC47166087253FAAD2CD5ECBB314">
             <trusting group="commons-beanutils"/>
@@ -32784,6 +32788,14 @@
             <sha256 value="ea23365abca70f90613ed7ed452ceaea3c48831181bfa0c18b21f2aa63659e76" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.mnode.ical4j" name="ical4j" version="4.2.1">
+         <artifact name="ical4j-4.2.1.jar">
+            <sha256 value="fe90cc259c2cea1d662df2a001b037daea9636cf56697e0db63fe2eddf833914" origin="Generated by Gradle" reason="A key couldn't be downloaded"/>
+         </artifact>
+         <artifact name="ical4j-4.2.1.module">
+            <sha256 value="78c9e9a44b1b4ddf6a51edba979fcb09819709a65565bb36a9407e99414f1ca7" origin="Generated by Gradle" reason="A key couldn't be downloaded"/>
+         </artifact>
+      </component>
       <component group="org.mockito" name="mockito-android" version="4.11.0">
          <artifact name="mockito-android-4.11.0.jar">
             <sha256 value="c631906a7909199f47c4e0d68137bd37a909d2577f06548fe2642b7189cf6358" origin="Generated by Gradle"/>