Add ViewModel File Template.

.idea/file.template.settings.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExportableFileTemplateSettings">
+    <default_templates>
+      <template name="ViewModel.kt" file-name="${NAME}ViewModel" reformat="true" live-template-enabled="false" />
+    </default_templates>
+  </component>
+</project>

.idea/fileTemplates/ViewModel.kt

@@ -0,0 +1,20 @@
+#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME}
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.ViewModel
+import org.thoughtcrime.securesms.util.livedata.Store
+import io.reactivex.rxjava3.disposables.CompositeDisposable
+
+#end
+#parse("File Header.java")
+class ${NAME}ViewModel : ViewModel() {
+
+  private val store = Store(${NAME}State())
+  private val disposables = CompositeDisposable()
+  
+  val state: LiveData<${NAME}State> = store.stateLiveData
+
+  override fun onCleared() {
+    disposables.clear()
+  }
+}