multiplatform: stop video playback when swiping away (#6588)

* android/build.gralde.kts: add JAVA_HOME to PATH

* fullScreenView: dispose player.stop when view changes

* fullScreenView: stop the video playback midway swipe

Previously, video playback stopped **only** when screen was fully swiped away to next item.

* ImageFullScreenView: simplify

* revert back VideoView

apps/multiplatform/android/build.gradle.kts

@@ -192,7 +192,10 @@ tasks {
             }
             exec {
                 workingDir("../../scripts/android")
-                environment = mapOf("JAVA_HOME" to "$javaHome")
+                environment = mapOf(
+                  "JAVA_HOME" to "$javaHome",
+                  "PATH" to "${javaHome}/bin${File.pathSeparator}${System.getenv("PATH")}"
+                )
                 commandLine = listOf(
                     "./compress-and-sign-apk.sh",
                     "${rootProject.extra["compression.level"]}",

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/ImageFullScreenView.kt

@@ -158,7 +158,10 @@ fun ImageFullScreenView(imageProvider: () -> ImageGalleryProvider, close: () ->
           val uriDecrypted = remember(media.uri.path) { mutableStateOf(if (media.fileSource?.cryptoArgs == null) media.uri else media.fileSource.decryptedGet()) }
           val decrypted = uriDecrypted.value
           if (decrypted != null) {
-            VideoView(modifier, decrypted, preview, index == settledCurrentPage, close)
+            // settledCurrentPage finishes **only** when fully swiped
+            // So we use pagerState.currentPage that changes right away as the screen is being dragged
+            val isCurrentPage = index == pagerState.currentPage && kotlin.math.abs(pagerState.currentPageOffsetFraction) < 0.3f
+            VideoView(modifier, decrypted, preview, isCurrentPage, close)
             DisposableEffect(Unit) {
               onDispose { playersToRelease.add(decrypted) }
             }