Respect battery optimization setting when auto-updating

* Don't enable auto-install for updates if battery optimization permission
  is not granted during onboarding.
* Drop showing warning in toolbar, show it instead if they want auto-install
* Don't check for the same during downloads. Failing is better instead.

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/extensions/Context.kt

@@ -177,7 +177,9 @@ fun Context.accentColor(): Int {
 }
 
 fun Context.isIgnoringBatteryOptimizations(): Boolean {
-    if (!isMAndAbove()) return true
-    return !(getSystemService(Context.POWER_SERVICE) as PowerManager)
-        .isIgnoringBatteryOptimizations(packageName)
+    return if (isMAndAbove()) {
+        (getSystemService(Context.POWER_SERVICE) as PowerManager).isIgnoringBatteryOptimizations(packageName)
+    } else {
+        true
+    }
 }