Workaround for 4.2.2 samsung(and some other devices) bug with appcompat-v7 Toolbar.

android/build.gradle

@@ -284,6 +284,8 @@ android {
 
     release {
       signingConfig signingConfigs.mapswithme
+      minifyEnabled true
+      proguardFile('proguard-mwm.txt')
     }
 
     beta {

android/proguard-mwm.txt

@@ -0,0 +1,13 @@
+# obfuscate supportV7 menu subclasses. it fixes bug with some Samsung and other devices ROMS based on android 4.2.2.
+# more details here : https://code.google.com/p/android/issues/detail?id=78377
+-keep class !android.support.v7.internal.view.menu.**,** {*;}
+# ignore warnings from MRGS billing.
+-dontwarn ru.mail.**
+
+# log proguard info
+#
+#-verbose
+#
+#-printseeds seeds.txt
+#-printusage unused.txt
+#-printmapping mapping.txt