Register logcat logger (duckduckgo#2628)

Task/Issue URL: https://app.asana.com/0/488551667048375/1203228473135603/f

### Description
Forgot to register the `logcat` logger for the VPN process. done

### Steps to test this PR
(optional)
- [x] install from this branch
- [x] filter logcat with `VPN log`
- [x] enable AppTP
- [x] logs should appear (this test would fail on develop branch)

Author: aitorvs

app/build.gradle

@@ -273,6 +273,7 @@ dependencies {
     implementation "io.reactivex.rxjava2:rxjava:_"
     implementation "io.reactivex.rxjava2:rxandroid:_"
     implementation JakeWharton.timber
+    implementation "com.squareup.logcat:logcat:_"
 
     // ThreeTenABP
     implementation "com.jakewharton.threetenabp:threetenabp:_"

app/src/main/java/com/duckduckgo/app/global/DuckDuckGoApplication.kt

@@ -34,6 +34,8 @@ import io.reactivex.plugins.RxJavaPlugins
 import java.io.File
 import javax.inject.Inject
 import kotlinx.coroutines.*
+import logcat.AndroidLogcatLogger
+import logcat.LogcatLogger
 import org.threeten.bp.zone.ZoneRulesProvider
 import timber.log.Timber
 
@@ -93,7 +95,7 @@ open class DuckDuckGoApplication : HasDaggerInjector, MultiProcessApplication()
     }
 
     override fun onSecondaryProcessCreate(shortProcessName: String) {
-        configureLogging()
+        LogcatLogger.install(AndroidLogcatLogger())
         Timber.d("onSecondaryProcessCreate $shortProcessName")
         runInSecondaryProcessNamed(VPN_PROCESS_NAME) {
             Timber.d("Init for secondary process $shortProcessName")