Element Call SPA integration (#1283)

* Integrate Element Call into EX, being able to open its URLs and handle the call in-app.
* Add custom scheme support with format `element:call?url=...`.
* Update androix.webkit
* Silence the foreground service notification.
- Allow foreground service tap action to re-open the ongoing call.
- Unify notification small icons in different modules using a vector one.

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Co-authored-by: ElementBot <benoitm+elementbot@element.io>

tests/uitests/build.gradle.kts

@@ -52,6 +52,7 @@ dependencies {
     // `testOptions { unitTests.isIncludeAndroidResources = true }` in the app build.gradle.kts file
     // implementation(projects.app)
     implementation(projects.appnav)
+    implementation(projects.features.call)
     allLibrariesImpl()
     allServicesImpl()
     allFeaturesImpl(rootDir, logger)

tests/uitests/src/test/snapshots/images/ui_S_t[f.call_null_CallScreenView-D-0_0_null,NEXUS_5,1.0,en].png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:26df292602cdf27ddd42b3b4c1dcc3fc7ae41e207af48d76c7b65bd66babf649
+size 10561

tests/uitests/src/test/snapshots/images/ui_S_t[f.call_null_CallScreenView-N-0_1_null,NEXUS_5,1.0,en].png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f28b5214727111f39cef9a1d625469f30481fe2cbbe02df0efc53807a968d210
+size 9787