android: reduce battery usage by not using permanent wakelock (#6176)

* android, desktop: core API event timeout setting

* chat_recv_msg_wait with STM timeout

* Revert "chat_recv_msg_wait with STM timeout"

This reverts commit fdfa2964c5.

* do not use permanent wake lock

* wakelock option, get wakelock on network information change

* remove option

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/helpers/NetworkObserver.kt

@@ -73,6 +73,7 @@ class NetworkObserver {
   }
 
   private fun setNetworkInfo(info: UserNetworkInfo) {
+    getWakeLock(timeout = 180000)
     Log.d(TAG, "Network changed: $info")
     noNetworkJob.cancel()
     if (info.online) {

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/AppCommon.android.kt

@@ -13,7 +13,6 @@ import java.lang.ref.WeakReference
 import java.util.*
 import java.util.concurrent.Semaphore
 import kotlin.concurrent.thread
-import kotlin.random.Random
 
 actual val appPlatform = AppPlatform.ANDROID
 

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/SimplexService.android.kt

@@ -0,0 +1,28 @@
+package chat.simplex.common.platform
+
+import android.content.Context
+import android.os.PowerManager
+
+actual fun getWakeLock(timeout: Long): (() -> Unit) {
+  val context = AppContextProvider.getApplicationContext()
+    ?: throw IllegalStateException("Application context not initialized")
+  var wakeLock: PowerManager.WakeLock? = (context.applicationContext.getSystemService(Context.POWER_SERVICE) as PowerManager).run {
+    newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "SimplexService::lock").apply {
+      acquire(timeout)
+    }
+  }
+  return {
+    wakeLock?.release()
+    wakeLock = null
+  }
+}
+
+object AppContextProvider {
+  private var applicationContext: Context? = null
+
+  fun initialize(context: Context) {
+    this.applicationContext = context.applicationContext
+  }
+
+  fun getApplicationContext(): Context? = applicationContext
+}