Handle AVD manager error status

Tools offer to start Android AVD manager if a HybridMobileStatus with
AVD issue code is encountered.
fix integrity problems with platform ui plugins

Fixes AndroidUI and IOSUI for integrity. IOSUI now supports getDefault
and AndroidUI plugin id is adjusted to symbolic name.
Integrity test for plugins 

Tests for testing the plugin integrity and attributes and also many
copyright fixes.
bug JBIDE-15919 - The API for installed plugins list is slow

Changesthe implementation if isPluginInstalled() so that it no longer
depends on a full list of installed plugins to be constructed. Also
installed plugin list cached now until a plugin is installed/removed.