Fix Android Lint warnings.

MyTracks/proguard.cfg

@@ -35,15 +35,15 @@
 -keep public class * extends android.preference.Preference
 -keep public class com.android.vending.licensing.ILicensingService
 
--keepclasseswithmembernames class * {
+-keepclasseswithmembes class * {
     native <methods>;
 }
 
--keepclasseswithmembernames class * {
+-keepclasseswithmembers class * {
     public <init>(android.content.Context, android.util.AttributeSet);
 }
 
--keepclasseswithmembernames class * {
+-keepclasseswithmembers class * {
     public <init>(android.content.Context, android.util.AttributeSet, int);
 }