Enable java.* imports for OSGi Import-Package

Newer OSGi specs (R7 and R8) allow 'java.*'' imports while
older ones (R6) does not. This change breaks compatibility with
old tools that only support OSGi spec up to R6.

Closes gh-6816

Author: jonatan-ivanov

micrometer-commons/build.gradle

@@ -16,7 +16,6 @@ jar {
     bundle {
         bnd '''\
         Import-Package: \
-            !java.*,\
             org.aspectj.*;resolution:=dynamic,\
             org.slf4j.*;resolution:=dynamic,\
             javax.annotation.*;resolution:=optional;version="${@}",\

micrometer-core/build.gradle

@@ -50,7 +50,6 @@ jar {
     bundle {
         bnd '''\
         Import-Package: \
-            !java.*,\
             org.aspectj.*;resolution:=dynamic,\
             com.github.benmanes.caffeine.*;resolution:=dynamic;version="${@}",\
             net.sf.ehcache.*;resolution:=dynamic;version="${@}",\

micrometer-jakarta9/build.gradle

@@ -4,7 +4,6 @@ jar {
     bundle {
         bnd '''\
         Import-Package: \
-            !java.*,\
             jakarta.jms.*;resolution:=dynamic;version="${@}",\
             jakarta.mail.*;resolution:=dynamic;version="${@}",\
             io.micrometer.observation.*;resolution:=dynamic;version="${@}",\

micrometer-observation/build.gradle

@@ -28,7 +28,6 @@ jar {
     bundle {
         bnd '''\
         Import-Package: \
-            !java.*,\
             javax.servlet.*;resolution:=optional,\
             io.micrometer.context.*;resolution:=optional,\
             org.aspectj.*;resolution:=optional,\