test(SubscriptionControllerComponentTest): fix Kotlin compilation errors

> Task :compileDebugAndroidTestKotlin FAILED
e: file:///mnt/storage/projects/7sim/7sim/tests/androidTest/src/java/com/github/iusmac/sevensim/telephony/SubscriptionControllerComponentTest.kt:60:74 Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type (Mutable)List<SubscriptionInfo!>?
e: file:///mnt/storage/projects/7sim/7sim/tests/androidTest/src/java/com/github/iusmac/sevensim/telephony/SubscriptionControllerComponentTest.kt:119:13 Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type (Mutable)List<SubscriptionInfo!>?

Signed-off-by: iusmac <iusico.maxim@libero.it>

Author: iusmac

tests/androidTest/src/java/com/github/iusmac/sevensim/telephony/SubscriptionControllerComponentTest.kt

@@ -57,7 +57,7 @@ class SubscriptionControllerComponentTest {
     val mHiltRule: HiltAndroidRule = HiltAndroidRule(this)
 
     private val mSubId: Int by lazy() {
-        val subInfo = mSubscriptionManager.selectableSubscriptionInfoList.firstOrNull()
+        val subInfo = mSubscriptionManager.selectableSubscriptionInfoList!!.firstOrNull()
         subInfo?.subscriptionId ?: INVALID_SUBSCRIPTION_ID
     }
 
@@ -115,7 +115,7 @@ class SubscriptionControllerComponentTest {
     }
 
     private fun areUiccApplicationsEnabled() = with(mSubscriptionManager) {
-        getSelectableSubscriptionInfoList()
+        selectableSubscriptionInfoList!!
             .first { sub -> sub.subscriptionId == mSubId }
             .areUiccApplicationsEnabled()
     }