added comment about android sdk component upgrade and resulting problems to avoid others falling into the same problem
added comment about android sdk component upgrade and resulting problems to avoid others falling into the same problem

WonderCsabo/maven-android-plugin,Cha0sX/android-maven-plugin,kedzie/maven-android-plugin,wskplho/android-maven-plugin,greek1979/maven-android-plugin,mitchhentges/android-maven-plugin,jdegroot/android-maven-plugin,Stuey86/android-maven-plugin,secondsun/maven-android-plugin,xieningtao/android-maven-plugin,xieningtao/android-maven-plugin,Stuey86/android-maven-plugin,Cha0sX/android-maven-plugin,xiaojiaqiao/android-maven-plugin,WonderCsabo/maven-android-plugin,psorobka/android-maven-plugin,simpligility/android-maven-plugin,psorobka/android-maven-plugin,mitchhentges/android-maven-plugin,CJstar/android-maven-plugin,hgl888/android-maven-plugin,jdegroot/android-maven-plugin,ashutoshbhide/android-maven-plugin,kedzie/maven-android-plugin,b-cuts/android-maven-plugin,hgl888/android-maven-plugin,CJstar/android-maven-plugin,repanda/android-maven-plugin,secondsun/maven-android-plugin,b-cuts/android-maven-plugin,secondsun/maven-android-plugin,Cha0sX/android-maven-plugin,greek1979/maven-android-plugin,wskplho/android-maven-plugin,ashutoshbhide/android-maven-plugin,repanda/android-maven-plugin,xiaojiaqiao/android-maven-plugin,xiaojiaqiao/android-maven-plugin