fix(app): fully migrate to java.time

app/src/main/java/app/passwordstore/ui/git/log/GitLogAdapter.kt

@@ -11,8 +11,8 @@ import androidx.recyclerview.widget.RecyclerView
 import app.passwordstore.databinding.GitLogRowLayoutBinding
 import app.passwordstore.util.git.GitCommit
 import app.passwordstore.util.git.GitLogModel
-import java.text.DateFormat
-import java.util.Date
+import java.time.Instant
+import java.time.format.DateTimeFormatter
 import logcat.LogPriority.ERROR
 import logcat.logcat
 
@@ -20,8 +20,8 @@ private fun shortHash(hash: String): String {
   return hash.substring(0 until 8)
 }
 
-private fun stringFrom(date: Date): String {
-  return DateFormat.getDateTimeInstance().format(date)
+private fun stringFrom(date: Instant): String {
+  return DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(date)
 }
 
 /** @see GitLogActivity */

app/src/main/java/app/passwordstore/util/extensions/Extensions.kt

@@ -10,7 +10,7 @@ import com.github.michaelbull.result.Result
 import com.github.michaelbull.result.getOrElse
 import com.github.michaelbull.result.runCatching
 import java.io.File
-import java.util.Date
+import java.time.Instant
 import logcat.asLog
 import org.eclipse.jgit.lib.ObjectId
 import org.eclipse.jgit.revwalk.RevCommit
@@ -57,11 +57,10 @@ val RevCommit.hash: String
  *
  * @see RevCommit.commitTime
  */
-val RevCommit.time: Date
+val RevCommit.time: Instant
   get() {
     val epochSeconds = commitTime.toLong()
-    val epochMilliseconds = epochSeconds * 1000
-    return Date(epochMilliseconds)
+    return Instant.ofEpochSecond(epochSeconds)
   }
 
 /** Alias to [lazy] with thread safety mode always set to [LazyThreadSafetyMode.NONE]. */

app/src/main/java/app/passwordstore/util/git/GitCommit.kt

@@ -5,7 +5,7 @@
 
 package app.passwordstore.util.git
 
-import java.util.Date
+import java.time.Instant
 
 /**
  * Basic information about a git commit.
@@ -19,5 +19,5 @@ data class GitCommit(
   val hash: String,
   val shortMessage: String,
   val authorName: String,
-  val time: Date
+  val time: Instant
 )