[LSC] Add LOCAL_LICENSE_KINDS to frameworks/libs/net

Added SPDX-license-identifier-Apache-2.0 to:
  client-libs/Android.bp
  client-libs/tests/unit/Android.bp
  common/Android.bp
  common/native/bpf_syscall_wrappers/Android.bp
  common/native/netjniutils/Android.bp
  common/tests/unit/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I6ea23b03b1fadb54c7974c9f716f0f13795f84c5

staticlibs/Android.bp

@@ -27,6 +27,10 @@
 // included in the bootclasspath, they could incorrectly be included in the SDK documentation even
 // though they are not in the current.txt files.
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 java_library {
   name: "net-utils-device-common",
   srcs: [

staticlibs/native/bpf_syscall_wrappers/Android.bp

@@ -12,6 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 cc_library_headers {
     name: "bpf_syscall_wrappers",
     vendor_available: false,

staticlibs/native/netjniutils/Android.bp

@@ -12,6 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 cc_library_static {
     name: "libnetjniutils",
     srcs: ["netjniutils.cpp"],

staticlibs/tests/unit/Android.bp

@@ -2,6 +2,10 @@
 // Build NetworkStaticLibTests package
 //########################################################################
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 android_library {
     name: "NetworkStaticLibTestsLib",
     srcs: ["src/**/*.java","src/**/*.kt"],
@@ -38,4 +42,3 @@ android_test {
     jarjar_rules: "jarjar-rules.txt",
     test_suites: ["device-tests"],
 }
-