Allow users to trust self-signed certificates (#160)

* Implement CERT-Store

* Trust user-added certificates

* Improve code readability

* Implement saving self-signed certs to storage

* Create interface for TrustedCertificatesStore

* Remove unused code

* Make datasource implementation internal

* Bump app version to 29 (0.4.0)

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Co-authored-by: fz72 <fz72@gmx.de>

app/build.gradle.kts

@@ -16,8 +16,8 @@ plugins {
 android {
     defaultConfig {
         applicationId = "gq.kirmanak.mealient"
-        versionCode = 28
-        versionName = "0.3.13"
+        versionCode = 29
+        versionName = "0.4.0"
         testInstrumentationRunner = "gq.kirmanak.mealient.MealientTestRunner"
         testInstrumentationRunnerArguments += mapOf("clearPackageData" to "true")
         resourceConfigurations += listOf("en", "es", "ru", "fr", "nl", "pt", "de")