android: Improve workflow on devices with root

During initial scan of application, detect if root access is available
and track it.  If user later selects "Click here for ways to fix this".
display a new dialogue that offers to push the layer directly.

If pushing fails, fall back to production dialogue.

Also add a new persistent setting to enable automatic layer pushing.

qrenderdoc/Code/Interface/PersistantConfig.cpp

@@ -188,6 +188,9 @@ void PersistantConfig::AddAndroidHosts()
 
   SetConfigSetting(lit("MaxConnectTimeout"), QString::number(Android_MaxConnectTimeout));
 
+  SetConfigSetting(lit("Android_AutoPushLayerToApp"),
+                   Android_AutoPushLayerToApp ? lit("1") : lit("0"));
+
   rdctype::str androidHosts;
   RENDERDOC_EnumerateAndroidDevices(&androidHosts);
   for(const QString &hostName : ToQStr(androidHosts).split(QLatin1Char(','), QString::SkipEmptyParts))

qrenderdoc/Code/Interface/PersistantConfig.h

@@ -109,6 +109,8 @@ DECLARE_REFLECTION_STRUCT(SPIRVDisassembler);
                                                                                            \
   CONFIG_SETTING_VAL(public, int, int, Android_MaxConnectTimeout, 30)                      \
                                                                                            \
+  CONFIG_SETTING_VAL(public, bool, bool, Android_AutoPushLayerToApp, false)                \
+                                                                                           \
   CONFIG_SETTING_VAL(public, bool, bool, CheckUpdate_AllowChecks, true)                    \
                                                                                            \
   CONFIG_SETTING_VAL(public, bool, bool, CheckUpdate_UpdateAvailable, false)               \
@@ -347,6 +349,12 @@ For more information about some of these settings that are user-facing see
 
   Defaults to ``30``.
 
+.. data:: Android_AutoPushLayerToApp
+
+  Whether to automatically push the RenderDoc layer to the application's lib directory when running
+  on a device with root access.  This can enable debugging of Vulkan applications that didn't already
+  package the layer in the APK.
+
 .. data:: CheckUpdate_AllowChecks
 
   ``True`` if when colouring marker regions in the :class:`EventBrowser`, the whole row should be