find_java.exe: SDK tools require Java 1.6

find_java.exe is used to locate the Path to the JVM on Windows
and it checks the Java version. SDK tools require Java 1.6 now.

Also update the find_java error message to mention the
JAVA_HOME environment variable.

SDK Bug: 39876

Change-Id: I355998b10014471ccbe14ca9e977d07126b072c1
2 files changed